---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Mon 05/25/09: 14 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:31 AM - Re: yak 52 fuel instrument (Rob Rowe) 2. 09:47 AM - spark plug gapping (new questions) (skidmk) 3. 10:46 AM - Re: spark plug gapping (new questions) (doug sapp) 4. 10:46 AM - Re: spark plug gapping (new questions) (A. Dennis Savarese) 5. 11:44 AM - Re: spark plug gapping (new questions) (skidmk) 6. 12:11 PM - Re: Re: spark plug gapping (new questions) (doug sapp) 7. 03:38 PM - YAK 18 T with vibration (SRGraham) 8. 05:03 PM - Re: spark plug gapping (new questions) (skidmk) 9. 05:38 PM - 18T fabrivc (Joe Howse) 10. 05:38 PM - Re: Re: yak 52 fuel instrument (Yak Pilot) 11. 05:50 PM - Re: YAK 18 T with vibration (Yak Pilot) 12. 05:55 PM - Re: Re: yak 52 fuel instrument (Stephen Morrey) 13. 06:50 PM - Re: Re: yak 52 fuel instrument (Yak Pilot) 14. 08:37 PM - Re: Re: spark plug gapping (new questions) (Walter Lannon) ________________________________ Message 1 _____________________________________ Time: 07:31:29 AM PST US Subject: Yak-List: Re: yak 52 fuel instrument From: "Rob Rowe" Mark, I'll email you a later version of my schematic with the (2006) error corrected. You may have read too much into my last post. I didn't say it was a progressive binary sequence, just that there could be a unique logic combination per discrete fuel level. To that end I've created a logic state table (PDF attached - I'll email you a copy too) that weights the secondary coils by their individual in/anti-phase winding ratios. By arbitrarily multiplying this logic weighted ratio by 50 to make the numbers easier to interpret, the result is a close approximation of the fuel display readings (within +/- 4% until Read this topic online here: http://forums.matronics.com/viewtopic.php?p=245255#245255 Attachments: http://forums.matronics.com//files/fuel_display_logic_table_147.pdf ________________________________ Message 2 _____________________________________ Time: 09:47:01 AM PST US Subject: Yak-List: spark plug gapping (new questions) From: "skidmk" HI all,, changed my plugs at the annual this year (chinese to chinese) and we now have a vibration at high rpms. In keeping with the previous discussion of vibration, I'd like to check the gaps. I know the gap specs (from the book), but what massive electrode tool would I use to fix them if they are out? I've looked at ATS and aircraft spruce for a gapper, but they are all 18mm? thanks Mike -------- Mike "Skidmk" Bourget Ottawa, Ontario Read this topic online here: http://forums.matronics.com/viewtopic.php?p=245274#245274 ________________________________ Message 3 _____________________________________ Time: 10:46:11 AM PST US Subject: Re: Yak-List: spark plug gapping (new questions) From: doug sapp Mike,In every can of Chinese DZ5 plugs there are 10 plugs, copper gasket/seals and a gapping tool, this is a go/no go "feeler gauge" type tool. No need to buy any special tools. Always Yakin, Doug On Mon, May 25, 2009 at 9:40 AM, skidmk wrote: > > HI all,, > > changed my plugs at the annual this year (chinese to chinese) and we now > have a vibration at high rpms. > > In keeping with the previous discussion of vibration, I'd like to check the > gaps. > > I know the gap specs (from the book), but what massive electrode tool would > I use to fix them if they are out? > > I've looked at ATS and aircraft spruce for a gapper, but they are all 18mm? > > thanks > > Mike > > -------- > Mike "Skidmk" Bourget > Ottawa, Ontario > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=245274#245274 > > -- Always Yakin, Doug Sapp Phone 509-826-4610 Fax 509-826-3644 ________________________________ Message 4 _____________________________________ Time: 10:46:15 AM PST US From: "A. Dennis Savarese" Subject: Re: Yak-List: spark plug gapping (new questions) I'm pretty sure if you buy 20 Chinese spark plugs from Doug, the sealed container with the plugs has a neat little gapping tool in it. Check with Doug to see if this gapping tool is available separately. Dennis ----- Original Message ----- From: skidmk To: yak-list@matronics.com Sent: Monday, May 25, 2009 11:40 AM Subject: Yak-List: spark plug gapping (new questions) HI all,, changed my plugs at the annual this year (chinese to chinese) and we now have a vibration at high rpms. In keeping with the previous discussion of vibration, I'd like to check the gaps. I know the gap specs (from the book), but what massive electrode tool would I use to fix them if they are out? I've looked at ATS and aircraft spruce for a gapper, but they are all 18mm? thanks Mike -------- Mike "Skidmk" Bourget Ottawa, Ontario Read this topic online here: http://forums.matronics.com/viewtopic.php?p=245274#245274 ________________________________ Message 5 _____________________________________ Time: 11:44:50 AM PST US Subject: Yak-List: Re: spark plug gapping (new questions) From: "skidmk" Hi guys,, yes the go no go tool is there. I'm not terribly familiar with its use (used to gappers), and as such didn't want to risk bending/breaking an electrode/other. I understand the gap tool slides down next to the electrode to test the gap,and it should be tight, but easily slide up and down. However if there are instances where the gap is too tight, can the tool be used to bend the plug back? M -------- Mike "Skidmk" Bourget Ottawa, Ontario Read this topic online here: http://forums.matronics.com/viewtopic.php?p=245296#245296 ________________________________ Message 6 _____________________________________ Time: 12:11:30 PM PST US Subject: Re: Yak-List: Re: spark plug gapping (new questions) From: doug sapp If it is too tight just tap it in and it will set the correct gap. Doug On Mon, May 25, 2009 at 11:38 AM, skidmk wrote: > > Hi guys,, > > yes the go no go tool is there. I'm not terribly familiar with its use > (used to gappers), and as such didn't want to risk bending/breaking an > electrode/other. > > I understand the gap tool slides down next to the electrode to test the > gap,and it should be tight, but easily slide up and down. However if there > are instances where the gap is too tight, can the tool be used to bend the > plug back? > > M > > -------- > Mike "Skidmk" Bourget > Ottawa, Ontario > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=245296#245296 > > -- Always Yakin, Doug Sapp Phone 509-826-4610 Fax 509-826-3644 ________________________________ Message 7 _____________________________________ Time: 03:38:29 PM PST US From: "SRGraham" Subject: Yak-List: YAK 18 T with vibration My 18 I understand had similar problems, until Denis and his magic ignition system was installed. At the risk of offending the gods, my 18 purrs under all conditions, our temperatures get down to about -5 and up as far as 35 centigrade. She has never turned a hair under any circumstances, the colder it is the better she likes it. I spend a lot of time flying over Bass Strait, loads of open water and when not overwater climb over mountains. The only place that is flat is where we land. I cannot recommend Dennis's system enough and the automotive champion plugs are cheap as chips Cheers SG -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Yak-List Digest Server Sent: Saturday, 23 May 2009 4:59 PM Subject: Yak-List Digest: 12 Msgs - 05/22/09 * ================================================= Online Versions of Today's List Digest Archive ================================================= Today's complete Yak-List Digest can also be found in either of the two Web Links listed below. The .html file includes the Digest formatted in HTML for viewing with a web browser and features Hyperlinked Indexes and Message Navigation. The .txt file includes the plain ASCII version of the Yak-List Digest and can be viewed with a generic text editor such as Notepad or with a web browser. HTML Version: http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter 09-05-22&Archive=Yak Text Version: http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter 2009-05-22&Archive=Yak =============================================== EMail Version of Today's List Digest Archive =============================================== ---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Fri 05/22/09: 12 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:25 AM - Re: Still looking for a snot valve - help (Scott Poehlmann) 2. 06:23 AM - Re: Install a GARMIN GPS 296 in a YAK 52 cockpit ? (LawnDart) 3. 09:17 AM - Re: Interference of GPS on Becker VHF (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E) 4. 09:41 AM - Re: Still looking for a snot valve - help (doug sapp) 5. 09:41 AM - Re: Engine or prop judder on 18 T (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E) 6. 09:42 AM - Re: Still looking for a snot valve - help (Herb Coussons) 7. 11:12 AM - Re: Still looking for a snot valve - help (Herb Coussons) 8. 11:17 AM - Re: Engine or prop judder on 18 T (Roger Kemp M.D.) 9. 01:34 PM - Re: Still looking for a snot valve - help (doug sapp) 10. 05:37 PM - Re: Still looking for a snot valve - help (Scott Poehlmann) 11. 05:50 PM - Re: Overhauled M14P engines available (Joe Howse) 12. 07:40 PM - Re: Still looking for a snot valve - help (Herb Coussons) ________________________________ Message 1 _____________________________________ Time: 04:25:03 AM PST US From: Scott Poehlmann Subject: Re: Yak-List: Still looking for a snot valve - help Hi Anthony, Since the volume of the bottle (and the whole system, in fact) on the 55 is so low, many do not have separate snot valves. Mine for example only has the valve on the bottom of the tank. I dutifully open it slightly and drain out the gunk about once a week or so (and you don't need to completely drain the system, though until you get used to doing it quickly, be prepared to refill the air system), and at each annual I use that valve to drain the entire system. It is also the lowest point in the system, so that's where the gunk ends up. Scott Yak 55M wrote: > Hi, > > I have finally secured almost everything I need to add a compressor to > my Yak55M, but I am missing one more item - a snot valve. It seems > this little item is difficult to get. Any lines on where I can get a > snot valve would be greatly appreciated. > > Thanks in advance, > > Anthony. > > BTW, thanks for all of the advice in finding the sheer coupling and > gauge, this list made it happen. > * > > > * ________________________________ Message 2 _____________________________________ Time: 06:23:06 AM PST US Subject: Yak-List: Re: Install a GARMIN GPS 296 in a YAK 52 cockpit ? From: "LawnDart" I use RAM mounts. They have one that will mount to the glare shield and hold the 296. It is very sturdy and does not vibrate in flight. Mount: RAM-B-177-GA7U http://tinyurl.com/pyojro I mounted mine in the center. Does cover up the artificial horizon when mounted. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=244958#244958 ________________________________ Message 3 _____________________________________ Time: 09:17:48 AM PST US Subject: RE: Yak-List: Interference of GPS on Becker VHF From: "Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E" I am not sure whether I told you this or not Hans, so I might be repeating myself. If you put in the filters, make sure you GROUND the SHIELD on the original P lead wire that will then connect to the new filter. Mark -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Hans Oortman Sent: Thursday, May 21, 2009 3:44 AM Subject: RE: Yak-List: Interference of GPS on Becker VHF Mark, Thanks for the suggestions. I am going to do those in the next few days. We have a few bank holidays any way so, time to fly. I ordered the filters, just in case, it certainly won't hurt to install these and at the same time I can check the shielding at the P-lead. I'll keep you updated! Hans Tel: +31 653 286022 ________________________________ Van: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] Namens Yak Pilot Verzonden: donderdag 21 mei 2009 5:37 Aan: yak-list@matronics.com Onderwerp: Re: Yak-List: Interference of GPS on Becker VHF Hans, this is a much better explanation. Try this. Next time you go fly, leave the power lead connected for the GPS, but if possible unplug the GPS itself while leaving the power cord connected to the aircraft. Hopefully there is a disconnect plug at the GPS itself that would allow you to keep the GPS power cord connected with the actual GPS removed. Also tell me what happens if you TURN THE GPS OFF in flight! Does this impact the noise in the radio with the engine running? If NOT, then for some reason your GPS power cable is either radiating noise "somehow" or is picking noise up and putting it back into wiring where it should not be. While unusual, this kind of thing is not unknown. I suggest replacing your GPS power wire with dual conductor SHIELDED wire and make sure the shield is connected to ground at the power connector side only. Also, reducing RF noise from the Mags by using filters is never a bad idea. Before you do that, PLEASE check the P lead shields right at the MAG P LEAD CONNECTOR and make sure they are not twisted off! That happens ALL the time, and you need to physically check this yourself. When you unscrew the P lead connector on the mag, be SURE to hold the center of it still as you rotate the knurled knob or you will twist the shield right off. Best Regards, Mark Bitterlich ________________________________ From: Hans Oortman Sent: Monday, May 18, 2009 5:12:12 AM Subject: RE: Yak-List: Interference of GPS on Becker VHF Mark, Thanks for all the good advise/suggestions. I'll have a look at the shieldings. When you mentioned this, I went back in history and tried to recall when this phenoma started to occur. It is only since the last year and a half or so that this has become a real problem. I don't fly a lot with gps but when I do, I need it, if you know what I mean. As far as I can recall it happened after a 100hrs check up (done by our Lithuanian mechanic). At the same time, almost 2 years ago, I used the opportunity to install an additional power connector of the Lemo type. These Swiss connectors are the best you can find and have a lock facility build in rather than the normal cigarette lighter connectors which are big and have as good as no locking facility. I use those Lemo's in my company for equipment we design/produce for cable companies. To make sure that this power lead does not pick up RF, I installed a RF-choke just before the connector. When the engine is not running I hear no interference on any channel on the Becker Radio. The GPS is connected to the YAK52's power and there are no problems what so ever. It is only after I start the engine that the problem occurs as long as I have the GPS connected to the planes power. When I disconnect the power lead (a long curled cable) from the planes power the problem is gone. The AvMap IV does have a RF choke in its power lead. I was under the impression that the problem was caused by the gps but it is the combination of the set up, i.e. engine, radio, gps, which causes this problem, not an individual piece of equipment..I think...and only when the engine is running. I'll check the shields of the p-leads on both mags. The tacho generator has already been checked and the shielding of that device is OK. Installing these filters won't hurt any way, so I'll order them, just in case. Thanks for your help and advise! Hans Oortman, MBA, Ph.D. CEO STN BV ________________________________ Van: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] Namens Yak Pilot Verzonden: maandag 18 mei 2009 7:53 Aan: yak-list@matronics.com Onderwerp: Re: Yak-List: Interference of GPS on Becker VHF Let me clarify a little here. There is a shielded P lead wire. The center conductor is soldered to a little device that fits into the mag itself and makes an internal connection to the mag coil. You push this into the mag P lead hole and THEN screw on the outer shell per se. The shield for this wire is soldered to a wire CUP that fits into the screw on portion of the mag P lead connector AKA "The Shell". When you screw in the P lead connector onto the mag, or OFF of the mag, it is very easy to turn the threaded portion and ALSO turn the little piece that is soldered to the shield. If you DO turn this little piece as you screw off the threaded portion of the P lead connector, you will also twist the shield, and in so-doing will cause the shield to rip off from the connector. Thus the shield is no longer connected and there is no ground for it. It is like MASSIVELY EASY to do this! EVERY SINGLE AIRCRAFT USING AN M-14 ENGINE I HAVE EVER SEEN HAS AT LEAST SOME DAMAGE IN THIS AREA! Every single one. This WILL cause radio noise. Every time. (Hans, your problem is likely something else) The only way to avoid doing it is to "somehow" carefully hold that cup piece that sticks out the back of the threaded portion of the connector (the NUT per se) still as you turn the piece that screws off with your hand. I have a special tool made to do this. You can use needle nose pliers if you are careful. But if you ignore this advice and take off a P lead connector... you have VERY HIGH ODDS of damaging the shield. Rest assured, if you didn't know this, it is even money that your P lead shields are at the very minimum "damaged" if not completely broken. Mark ________________________________ From: Yak Pilot Sent: Monday, May 18, 2009 12:47:56 AM Subject: Re: Yak-List: Interference of GPS on Becker VHF One of the most common sources of interference to radios is from the P leads. One of the most common causes for that is the loss of a ground for the shield. The way this happens is when you unscrew the P lead connector on the mag itself, you do not also hold the shield cup on the back of the P lead connector still as you unscrew the P lead connector itself. The result of this is that you end up twisting the shield right off the connector. When you do this, the shield is no longer grounded. If the shield is not grounded, it will radiate noise just like there was no shield there to begin with and your radios will be filled with static and noise. So, before you go out and install any kind of filters, ALWAYS make sure that your P LEAD shields are indeed correctly soldered and attached to the P lead connector itself. If everything is ok in that department and you still have noise and decide to try a P lead filter, install it any way you choose, but make certain that when you are done, the P lead shield itself still has a proper ground on it, if not at the P lead connector itself, then in some other manner as you see fit. Do not allow the P lead wire shield "float", and keep the amount of unshielded P lead wire as short as possible when installing a filter and keep the length of the wire from the P lead shield to ground as short as possible as well. Another terrific source of noise is the Tach Gen, and if the shield on that wire bundle breaks, the noise can be so strong it will burn out the receiver on a Balkan 5. Mark Bitterlich ________________________________ From: Roger Kemp M.D. Sent: Monday, May 18, 2009 11:10:52 AM Subject: RE: Yak-List: Interference of GPS on Becker VHF Two magneto filters are required. Doc From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of A. Dennis Savarese Sent: Sunday, May 17, 2009 8:26 AM Subject: Re: Yak-List: Interference of GPS on Becker VHF Yes, we installed both filters. Dennis ----- Original Message ----- From: Hans Oortman To: yak-list@matronics.com Sent: Sunday, May 17, 2009 8:22 AM Subject: RE: Yak-List: Interference of GPS on Becker VHF Dennis, Did you install the in-line filter as well as the magneto filter?? Hans ________________________________ Van: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] Namens A. Dennis Savarese Verzonden: zondag 17 mei 2009 15:03 Aan: yak-list@matronics.com Onderwerp: Re: Yak-List: Interference of GPS on Becker VHF We recently had a problem with Doc's Yak 50 with noise on the Becker VHF. First we installed a nice inline filter on the DC buss; http://www.lonestaraviation.com/product_details.asp?Product_Name=The%20Elimi nator. It removed much of the noise, but not all. Then we installed the magneto filters directly on the P leads going into the magnetos. http://www.lonestaraviation.com/product_details.asp?Product_Name=Magneto%20F ilter. Bingo.....noise eliminated. I mounted the ground strap to the studs on the accessory case back plate. Dennis ----- Original Message ----- From: Hans Oortman To: yak-list@matronics.com Sent: Sunday, May 17, 2009 7:42 AM Subject: Yak-List: Interference of GPS on Becker VHF Guys, May be some of you on the yak net has some idea how to resolve the following problem. Mark any suggestions?? I own a Avmap IV GPS, great tool but it is getting a nuisance in the 52. The following happens: when on the ground GPS switched on, VHF on, engine NOT running, no interference on VHF at all! when on the ground GPS switched on, VHF on, engine running (or in the air for that matter), huge interference on VHF, S5 to 6 noise level, i.e. very difficult comms. When switching over on battery (i.e. pulling the plug out...) the problem is as good as gone. Has any body had this experience also and what have you done about it? I am thinking on a LPF or a separate DC-DC convertor for the AvMap GPS. In principle the AvMap swallows any voltage between 10 and 36v. I assume that the 28v generator is not producing a nice DC which causes something to start generating a noise, in my case the GPS but I do not have an explanation for that at all.... Any help is appreciated! Hans RA3326K / EHSE href="http://www.matronics.com/Navigator?Yak-List">http://www.matronhref="ht tp://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c href="http://www.matronics.com/Navigator?Yak-List">http://www.matronhref="ht tp://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com/ Navigator?Yak-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c http://www.matronics.com/Navigator?Yak-List http://forums.matronics.com http://www.matronics.com/contribution http://www.matronics.com/Navigator?Yak-Lisnics.com/contribution" target=_blank rel=nofollow>http://www.matronics.com/contribution =========== http:======================== http://www.matronics.com/Navigator?Yak-List http://forums.matronics.com http://www.matronics.com/contribution = --> http://www.matronics.com/Navigator?Yak-List _ href="http://forums.matronics.com/" target=_blank rel=nofollow>http:========= href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com/ Navigator?Yak-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c ________________________________ Message 4 _____________________________________ Time: 09:41:40 AM PST US Subject: Re: Yak-List: Still looking for a snot valve - help From: doug sapp As always your mileage may vary but the thought of a rusted or corroded air bottle exploding in a aircraft really chills my crap!, in my mind it is simply is not worth the chance. Add to this the fact that your pushing all the moisture and gunk into your expensive start valve and check valves which is just not a good deal even if you have replaced all the springs with stainless steel. IMHO the added cost of a snot valve AND a dessicant filter will save you a bunch of money and trouble down the road. Always Yakin, Doug On Fri, May 22, 2009 at 4:23 AM, Scott Poehlmann wrote: > > Hi Anthony, > > Since the volume of the bottle (and the whole system, in fact) on the 55 is > so low, many do not have separate snot valves. Mine for example only has the > valve on the bottom of the tank. I dutifully open it slightly and drain out > the gunk about once a week or so (and you don't need to completely drain the > system, though until you get used to doing it quickly, be prepared to refill > the air system), and at each annual I use that valve to drain the entire > system. It is also the lowest point in the system, so that's where the gunk > ends up. > > Scott > > > Yak 55M wrote: > >> Hi, >> >> I have finally secured almost everything I need to add a compressor to my >> Yak55M, but I am missing one more item - a snot valve. It seems this little >> item is difficult to get. Any lines on where I can get a snot valve would >> be greatly appreciated. >> >> Thanks in advance, >> >> Anthony. >> >> BTW, thanks for all of the advice in finding the sheer coupling and gauge, >> this list made it happen. >> * >> >> >> * >> > > -- Always Yakin, Doug Sapp Phone 509-826-4610 Fax 509-826-3644 ________________________________ Message 5 _____________________________________ Time: 09:41:43 AM PST US Subject: RE: Yak-List: Engine or prop judder on 18 T From: "Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E" This might sound especially stupid and I hesitate to even mention it, but..... I recently had a very interesting problem in my YAK-50. Along with it becoming very difficult to start when hot, it also developed a very noticeable shake at high speeds. Pretty much exactly as you described which is why I am about to go out on a limb and just mention what happened to me. Anyway, after a full year of problems with the M-14 not wanting to start when hot, and after replacing every single piece of the starter ignition system, the only thing left was the spark plugs. I am using automotive plugs via Dennis's kit, which by the way is the best thing since sliced bread. So, I replaced the plugs. The starting problem went away and all is now well. I really had a hard time believing it was the plugs. Still do in fact, but the fact is.... The problem is GONE! ANYWAY ~ Funny thing. The high speed vibration went away too. Mag checks during all of this were always good. No indication of plug problems at all. Upon inspection, found that the plug gap was set too wide ... My fault for not double checking the A&P that was helping me put in the kit way back when. The plugs were at .032 or so. Dennis recommends .025 I have talked to other folks who claim .018 is about right, and that wider than .018 can cause "starting problems". I have mine now gapped at .025 per Dennis's recommendation and everything is working perfectly, so I will avoid .018, but it is worth keeping in the back of your head. Anyway... To get to the point... It's a real long shot, but you might have a spark plug problem, or some other sort of ignition problem, especially if you are using the original ignition wiring and ring. Mark Bitterlich -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Vic Sent: Tuesday, May 19, 2009 5:26 PM Subject: Yak-List: Engine or prop judder on 18 T Hello everybody, our 18 T has developed an engine or prop judder since last year that can be noticed mainly in high speed low passes at , say, 70 % engine speed and over 250 kph . We replaced all engine mounting rubbers, did a dynamic prop balancing on the ground with up to 90 % engine speed and the engine felt real smooth. But in the air at high speed dives the shaking of the engine/prop was still there - at a very reduced rate, but still noticeable . The setting of the blades was checked and seemed to be allright in the dynamic balancing . Could we have a problem with the prop hub in case the prop goes to fully coarse in the dive and the blade angles in this condition might be different for each blade ? We suspect some sort of backlash in the hub different for each side ? Has anybody an idea on that one ? Or could it be an aerodynamic effect specific for the 18 T ? We will dig deeper next weekend but any ideas would be appreciated. Regards Helga and Vic Read this topic online here: http://forums.matronics.com/viewtopic.php?p=244696#244696 ________________________________ Message 6 _____________________________________ Time: 09:42:52 AM PST US From: Herb Coussons Subject: Re: Yak-List: Still looking for a snot valve - help Exact same for me, the low point drain for the bottom of the air tank is mounted just on the Left of the oil cooler doghouse. Although it would be nice to have a separate valve to relaesa without dumping the air. Herb On May 22, 2009, at 6:23 AM, Scott Poehlmann wrote: > > Hi Anthony, > > Since the volume of the bottle (and the whole system, in fact) on > the 55 is so low, many do not have separate snot valves. Mine for > example only has the valve on the bottom of the tank. I dutifully > open it slightly and drain out the gunk about once a week or so (and > you don't need to completely drain the system, though until you get > used to doing it quickly, be prepared to refill the air system), and > at each annual I use that valve to drain the entire system. It is > also the lowest point in the system, so that's where the gunk ends up. > > Scott > > Yak 55M wrote: >> Hi, >> >> I have finally secured almost everything I need to add a compressor >> to my Yak55M, but I am missing one more item - a snot valve. It >> seems this little item is difficult to get. Any lines on where I >> can get a snot valve would be greatly appreciated. >> >> Thanks in advance, >> >> Anthony. >> >> BTW, thanks for all of the advice in finding the sheer coupling and >> gauge, this list made it happen. >> * >> >> >> * > > ________________________________ Message 7 _____________________________________ Time: 11:12:04 AM PST US From: Herb Coussons Subject: Re: Yak-List: Still looking for a snot valve - help Doug, If you are familiar with the yak 55 system (maybe they are all unique as they are each a retrofit), please describe the plumbing to add the snot valve. Has any body thought of adding a valve like the Wilga. My Yak 52 TW has the pull handle is in the cockpit to release the valve. On the Wilga it was up front behind the right cowl cheek - a screw type valve that released right there. Which of these types is more like the CJ or standard Yak? I would think the Wilga type would be the easiest to plumb for the 55 since the whole air system is in front of the firewall except the fill port and guage. Thanks, Herb On May 22, 2009, at 11:29 AM, doug sapp wrote: > As always your mileage may vary but the thought of a rusted or > corroded air bottle exploding in a aircraft really chills my crap!, > in my mind it is simply is not worth the chance. Add to this the > fact that your pushing all the moisture and gunk into your expensive > start valve and check valves which is just not a good deal even if > you have replaced all the springs with stainless steel. IMHO the > added cost of a snot valve AND a dessicant filter will save you a > bunch of money and trouble down the road. > > Always Yakin, > Doug > > On Fri, May 22, 2009 at 4:23 AM, Scott Poehlmann > wrote: > > Hi Anthony, > > Since the volume of the bottle (and the whole system, in fact) on > the 55 is so low, many do not have separate snot valves. Mine for > example only has the valve on the bottom of the tank. I dutifully > open it slightly and drain out the gunk about once a week or so (and > you don't need to completely drain the system, though until you get > used to doing it quickly, be prepared to refill the air system), and > at each annual I use that valve to drain the entire system. It is > also the lowest point in the system, so that's where the gunk ends up. > > Scott > > > Yak 55M wrote: > Hi, > > I have finally secured almost everything I need to add a compressor > to my Yak55M, but I am missing one more item - a snot valve. It > seems this little item is difficult to get. Any lines on where I > can get a snot valve would be greatly appreciated. > > Thanks in advance, > > Anthony. > > BTW, thanks for all of the advice in finding the sheer coupling and > gauge, this list made it happen. > * > > > * > > ========= > rget="_blank">http://www.matronics.com/Navigator?Yak-List > ========= > http://forums.matronics.com > ========= > le, List Admin. > ="_blank">http://www.matronics.com/contribution > ========= > > > -- > Always Yakin, > Doug Sapp > Phone 509-826-4610 > Fax 509-826-3644 > > ________________________________ Message 8 _____________________________________ Time: 11:17:24 AM PST US From: "Roger Kemp M.D." Subject: RE: Yak-List: Engine or prop judder on 18 T A glow plug. Quite possible...did not think of that one. The exact way a diesel engine or R/C model airplane engine runs...well used to before turbines and 4 stroke chainsaw engines were introduced the modeling communities. Doc -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E Sent: Friday, May 22, 2009 11:30 AM Subject: RE: Yak-List: Engine or prop judder on 18 T This might sound especially stupid and I hesitate to even mention it, but..... I recently had a very interesting problem in my YAK-50. Along with it becoming very difficult to start when hot, it also developed a very noticeable shake at high speeds. Pretty much exactly as you described which is why I am about to go out on a limb and just mention what happened to me. Anyway, after a full year of problems with the M-14 not wanting to start when hot, and after replacing every single piece of the starter ignition system, the only thing left was the spark plugs. I am using automotive plugs via Dennis's kit, which by the way is the best thing since sliced bread. So, I replaced the plugs. The starting problem went away and all is now well. I really had a hard time believing it was the plugs. Still do in fact, but the fact is.... The problem is GONE! ANYWAY ~ Funny thing. The high speed vibration went away too. Mag checks during all of this were always good. No indication of plug problems at all. Upon inspection, found that the plug gap was set too wide ... My fault for not double checking the A&P that was helping me put in the kit way back when. The plugs were at .032 or so. Dennis recommends .025 I have talked to other folks who claim .018 is about right, and that wider than .018 can cause "starting problems". I have mine now gapped at .025 per Dennis's recommendation and everything is working perfectly, so I will avoid .018, but it is worth keeping in the back of your head. Anyway... To get to the point... It's a real long shot, but you might have a spark plug problem, or some other sort of ignition problem, especially if you are using the original ignition wiring and ring. Mark Bitterlich -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Vic Sent: Tuesday, May 19, 2009 5:26 PM Subject: Yak-List: Engine or prop judder on 18 T Hello everybody, our 18 T has developed an engine or prop judder since last year that can be noticed mainly in high speed low passes at , say, 70 % engine speed and over 250 kph . We replaced all engine mounting rubbers, did a dynamic prop balancing on the ground with up to 90 % engine speed and the engine felt real smooth. But in the air at high speed dives the shaking of the engine/prop was still there - at a very reduced rate, but still noticeable . The setting of the blades was checked and seemed to be allright in the dynamic balancing . Could we have a problem with the prop hub in case the prop goes to fully coarse in the dive and the blade angles in this condition might be different for each blade ? We suspect some sort of backlash in the hub different for each side ? Has anybody an idea on that one ? Or could it be an aerodynamic effect specific for the 18 T ? We will dig deeper next weekend but any ideas would be appreciated. Regards Helga and Vic Read this topic online here: http://forums.matronics.com/viewtopic.php?p=244696#244696 ________________________________ Message 9 _____________________________________ Time: 01:34:43 PM PST US Subject: Re: Yak-List: Still looking for a snot valve - help From: doug sapp Herb,Am really not sure of the plumbing on the 55 or the 52 for that matter. From your description the Wilga snot valve sounds like the one used on a CJ wherein you reach inside the cowl and turn the knob/wheel and depending on which way the wind is blowing it blows crap all over your right leg or foot. To add a snot valve to any system is not difficult and I have the valves and most if not all the fitting here in my stock. Give me a call if I can be of help. 509-826-4610 I will be at Red Star 24th--the 1st. Always Yakin, Doug On Fri, May 22, 2009 at 11:09 AM, Herb Coussons wrote: > Doug,If you are familiar with the yak 55 system (maybe they are all unique > as they are each a retrofit), please describe the plumbing to add the snot > valve. > Has any body thought of adding a valve like the Wilga. My Yak 52 TW has > the pull handle is in the cockpit to release the valve. On the Wilga it was > up front behind the right cowl cheek - a screw type valve that released > right there. Which of these types is more like the CJ or standard Yak? > > I would think the Wilga type would be the easiest to plumb for the 55 since > the whole air system is in front of the firewall except the fill port and > guage. > > > Thanks, > > Herb > > > On May 22, 2009, at 11:29 AM, doug sapp wrote: > > As always your mileage may vary but the thought of a rusted or corroded air > bottle exploding in a aircraft really chills my crap!, in my mind it is > simply is not worth the chance. Add to this the fact that your pushing all > the moisture and gunk into your expensive start valve and check valves which > is just not a good deal even if you have replaced all the springs with > stainless steel. IMHO the added cost of a snot valve AND a dessicant filter > will save you a bunch of money and trouble down the road. > Always Yakin, > Doug > > On Fri, May 22, 2009 at 4:23 AM, Scott Poehlmann wrote: > >> >> Hi Anthony, >> >> Since the volume of the bottle (and the whole system, in fact) on the 55 >> is so low, many do not have separate snot valves. Mine for example only has >> the valve on the bottom of the tank. I dutifully open it slightly and drain >> out the gunk about once a week or so (and you don't need to completely drain >> the system, though until you get used to doing it quickly, be prepared to >> refill the air system), and at each annual I use that valve to drain the >> entire system. It is also the lowest point in the system, so that's where >> the gunk ends up. >> >> Scott >> >> >> Yak 55M wrote: >> >>> Hi, >>> >>> I have finally secured almost everything I need to add a compressor to my >>> Yak55M, but I am missing one more item - a snot valve. It seems this little >>> item is difficult to get. Any lines on where I can get a snot valve would >>> be greatly appreciated. >>> >>> Thanks in advance, >>> >>> Anthony. >>> >>> BTW, thanks for all of the advice in finding the sheer coupling and >>> gauge, this list made it happen. >>> * >>> >>> >>> * >>> >> >> ========= >> rget="_blank">http://www.matronics.com/Navigator?Yak-List >> ========= >> http://forums.matronics.com >> ========= >> le, List Admin. >> ="_blank">http://www.matronics.com/contribution >> ========= >> >> >> >> > > > -- > Always Yakin, > Doug Sapp > Phone 509-826-4610 > Fax 509-826-3644 > > *href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com /Navigator?Yak-List > href="http://forums.matronics.com">http://forums.matronics.com > href="http://www.matronics.com/contribution">http://www.matronics.com/contri bution > * > > > * > > -- Always Yakin, Doug Sapp Phone 509-826-4610 Fax 509-826-3644 ________________________________ Message 10 ____________________________________ Time: 05:37:41 PM PST US From: Scott Poehlmann Subject: Re: Yak-List: Still looking for a snot valve - help Hi Dennis, I agree with your concern, but the system in a most 55's is different than that in the 52 (or even the 50). First off, I (and most others) have an overboard dump line--99% of the time the compressor is pumping air overboard and NOT through the system, thus most of the time the system is sealed. I dutifully check for "snot" but essentially NEVER get anything out. Second, the system ONLY operates the starter--thus the lines are short and relatively straight--in fact my entire air system is on the engine side of the firewall except for the line to the cockpit pressure guage. Third, I at least have my tank visually inspected every other annual or so, so I know it isn't corroded (as a gynecologist, I find it fascinating that the exact same instrument I call a "diagnostic hysteroscope" and which costs over $15,000 can be had by an A&P for < $500 when it is called a "flexible boroscope"... but that's another discussion...). Given these things, I don't think that using the tank bottom drain valve as the snot valve is unreasonable--adding such a valve would just give me another point from which the system could leak. But the concern about corrosion is very real--just one look at the 52 from England that had the bottle explode is enough to convince me! Best, Scott doug sapp wrote: > As always your mileage may vary but the thought of a rusted or > corroded air bottle exploding in a aircraft really chills my crap!, in > my mind it is simply is not worth the chance. Add to this the fact > that your pushing all the moisture and gunk into your expensive start > valve and check valves which is just not a good deal even if you have > replaced all the springs with stainless steel. IMHO the added cost of > a snot valve AND a dessicant filter will save you a bunch of money and > trouble down the road. > > Always Yakin, > Doug > > On Fri, May 22, 2009 at 4:23 AM, Scott Poehlmann > wrote: > > > > > Hi Anthony, > > Since the volume of the bottle (and the whole system, in fact) on > the 55 is so low, many do not have separate snot valves. Mine for > example only has the valve on the bottom of the tank. I dutifully > open it slightly and drain out the gunk about once a week or so > (and you don't need to completely drain the system, though until > you get used to doing it quickly, be prepared to refill the air > system), and at each annual I use that valve to drain the entire > system. It is also the lowest point in the system, so that's where > the gunk ends up. > > Scott > > > Yak 55M wrote: > > Hi, > > I have finally secured almost everything I need to add a > compressor to my Yak55M, but I am missing one more item - a > snot valve. It seems this little item is difficult to get. > Any lines on where I can get a snot valve would be greatly > appreciated. > > Thanks in advance, > > Anthony. > > BTW, thanks for all of the advice in finding the sheer > coupling and gauge, this list made it happen. > * > > > * > > > ========= > rget="_blank">http://www.matronics.com/Navigator?Yak-List > ========= > http://forums.matronics.com > ========= > le, List Admin. > ="_blank">http://www.matronics.com/contribution > ========= > > > -- > Always Yakin, > Doug Sapp > Phone 509-826-4610 > Fax 509-826-3644 > * > > > * ________________________________ Message 11 ____________________________________ Time: 05:50:33 PM PST US From: "Joe Howse" Subject: Re: Yak-List: Overhauled M14P engines available Denni How much? Joe ----- Original Message ----- From: A. Dennis Savarese To: yak-list@matronics.com ; m14pengines-list@matronics.com Sent: Tuesday, May 19, 2009 5:50 AM Subject: Yak-List: Overhauled M14P engines available If anyone is interested in an overhauled M14P engine with prop flange for V530 or MTV 9 propeller, overhauled by SC Motorstar in 2008 with overhaul paperwork, please contact me off-list. I have 3 engines available. They are here in the US and presently stored in a climate controlled storage facility in Alabama. I will be happy to discuss a serviceable core exchange with you as well. Dennis ________________________________ Message 12 ____________________________________ Time: 07:40:39 PM PST US From: Herb Coussons Subject: Re: Yak-List: Still looking for a snot valve - help Are you kidding - a gynecologist? Me too! And I actually have used a flexible hysteroscope on an airplane. I have the same experience with the 55, I get hardly any return when I use the valve connected to the bottom of the tank. Whereas the CJ description that Doug gave, turning the knob behind the cowl on the Wilga dumped the biggest mess you can imagine. Herb Coussons On May 22, 2009, at 7:35 PM, Scott Poehlmann wrote: > > Hi Dennis, > > I agree with your concern, but the system in a most 55's is > different than that in the 52 (or even the 50). First off, I (and > most others) have an overboard dump line--99% of the time the > compressor is pumping air overboard and NOT through the system, thus > most of the time the system is sealed. I dutifully check for "snot" > but essentially NEVER get anything out. Second, the system ONLY > operates the starter--thus the lines are short and relatively > straight--in fact my entire air system is on the engine side of the > firewall except for the line to the cockpit pressure guage. Third, I > at least have my tank visually inspected every other annual or so, > so I know it isn't corroded (as a gynecologist, I find it > fascinating that the exact same instrument I call a "diagnostic > hysteroscope" and which costs over $15,000 can be had by an A&P for > < $500 when it is called a "flexible boroscope"... but that's > another discussion...). Given these things, I don't think that using > the tank bottom drain valve as the snot valve is unreasonable-- > adding such a valve would just give me another point from which the > system could leak. But the concern about corrosion is very real-- > just one look at the 52 from England that had the bottle explode is > enough to convince me! > > Best, > > Scott > > doug sapp wrote: >> As always your mileage may vary but the thought of a rusted or >> corroded air bottle exploding in a aircraft really chills my crap!, >> in my mind it is simply is not worth the chance. Add to this the >> fact that your pushing all the moisture and gunk into your >> expensive start valve and check valves which is just not a good >> deal even if you have replaced all the springs with stainless >> steel. IMHO the added cost of a snot valve AND a dessicant filter >> will save you a bunch of money and trouble down the road. >> Always Yakin, >> Doug >> >> On Fri, May 22, 2009 at 4:23 AM, Scott Poehlmann > > wrote: >> >> > >> >> Hi Anthony, >> >> Since the volume of the bottle (and the whole system, in fact) on >> the 55 is so low, many do not have separate snot valves. Mine for >> example only has the valve on the bottom of the tank. I dutifully >> open it slightly and drain out the gunk about once a week or so >> (and you don't need to completely drain the system, though until >> you get used to doing it quickly, be prepared to refill the air >> system), and at each annual I use that valve to drain the entire >> system. It is also the lowest point in the system, so that's where >> the gunk ends up. >> >> Scott >> >> >> Yak 55M wrote: >> >> Hi, >> >> I have finally secured almost everything I need to add a >> compressor to my Yak55M, but I am missing one more item - a >> snot valve. It seems this little item is difficult to get. >> Any lines on where I can get a snot valve would be greatly >> appreciated. >> >> Thanks in advance, >> >> Anthony. >> >> BTW, thanks for all of the advice in finding the sheer >> coupling and gauge, this list made it happen. >> * >> >> >> * >> >> >> ========= >> rget="_blank">http://www.matronics.com/Navigator?Yak-List >> ========= >> http://forums.matronics.com >> ========= >> le, List Admin. >> ="_blank">http://www.matronics.com/contribution >> ========= >> >> >> >> >> >> >> -- >> Always Yakin, >> Doug Sapp >> Phone 509-826-4610 >> Fax 509-826-3644 >> * >> >> >> * > > Checked by AVG - www.avg.com 18:14:00 ________________________________ Message 8 _____________________________________ Time: 05:03:00 PM PST US Subject: Yak-List: Re: spark plug gapping (new questions) From: "skidmk" yep did that, what if its too loose? -------- Mike "Skidmk" Bourget Ottawa, Ontario Read this topic online here: http://forums.matronics.com/viewtopic.php?p=245328#245328 ________________________________ Message 9 _____________________________________ Time: 05:38:04 PM PST US From: "Joe Howse" Subject: Yak-List: 18T fabrivc I am refabricing our 18T and found a strange thing on the ailerons, looks like a 2.5 inch leathet pad cemented over the leading edge skins at a gap midway between the hangewr bearings., both left and right.ailerons. Anyone seen this before or know the purpose? Joe ________________________________ Message 10 ____________________________________ Time: 05:38:05 PM PST US From: Yak Pilot Subject: Re: Yak-List: Re: yak 52 fuel instrument For anyone following this string.. =0A=C2-=0AI=99ve looked at Rob=99s diagrams and schematics and think that he is absolutely o n the right sheet of music on how this system works.=C2- I thought it was all phase related (I.E. Analog in nature) =C2-and not any kind of binary counter, in sequence or otherwise.=C2-=C2- After looking at Rob =99s work I have to conclude that I am totally wrong with my assumptions an d Rob=99s theory of operation is exactly right.=C2- Nice work Rob. =C2- Really first class. =0A=C2-=0AMark Bitterlich=0A=0A=0A=0A=0A______ __________________________=0AFrom: Rob Rowe =0AT o: yak-list@matronics.com=0ASent: Monday, May 25, 2009 10:30:32 AM=0ASubjec t: Yak-List: Re: yak 52 fuel instrument=0A=0A--> Yak-List message posted by : "Rob Rowe" =0A=0AMark,=0A=0AI'll email you a l ater version of my schematic with the (2006) error corrected.=0A=0AYou may have read too much into my last post. I didn't say it was a progressive bin ary sequence, just that there could be a unique logic combination per discr ete fuel level.=0A=0ATo that end I've created a logic state table (PDF atta ched - I'll email you a copy too) that weights the secondary coils by their individual in/anti-phase winding ratios. =0A=0ABy arbitrarily multiplying this logic weighted ratio by 50 to make the numbers easier to interpret, th e result is a close approximation of the fuel display readings (within +/- 4% until =0A=0A=0A=0A=0ARead this topic online here:=0A=0Ahttp://forums.mat ronics.com/viewtopic.php?p=245255#245255=0A=0A=0A=0A=0AAttachments: =0A =0Ahttp://forums.matronics.com//files/fuel_display_logic_table_147.pdf=0A = ________________________________ Message 11 ____________________________________ Time: 05:50:14 PM PST US From: Yak Pilot Subject: Re: Yak-List: YAK 18 T with vibration I have put Dennis Savarese's automotive plug and ignition wire kit in not o nly my own aircraft but have worked with and helped install it in 5 other M -14 equipped aircraft, some of them highly modified airshow engines.- The list of well known names that use it is off the chart.- IAC Unlimited co mpetitors, Airshow pilots, and just "good ole boys".- It is without a sha dow of a doubt the very best modification I have ever seen made on this eng ine, using price for performance as the determining factor.- I went for y ears and failed to put it on my own aircraft because I never "got a round-2 -it".- Stupid.- Once I put it in I cursed myself for not doing it soone r.- What more can anyone say?- Failing to take the time to put this kit in is a mistake.- It is the BEST $400 or so dollars that I have ever spe nt on my aircraft.- Period. =0A=0AMark Bitterlich=0A=0A-=0A=0A=0A=0A___ _____________________________=0AFrom: SRGraham =0ATo: yak-list@matronics.com=0ASent: Monday, May 25, 2009 6:37:36 PM=0ASubject: raham" =0A=0AMy 18 I understand had similar problems, until Denis and his magic ignition=0Asystem was installed. At the risk of offending the gods, my 18 purrs under=0Aall conditions, our temperatures ge t down to about -5 and up as far as 35=0Acentigrade. She has never turned a hair under any circumstances, the colder=0Ait is the better she likes it. I spend a lot of time flying over Bass=0AStrait, loads of open water and wh en not overwater climb over mountains. The=0Aonly place that is flat is whe re we land. I cannot recommend Dennis's system=0Aenough and the automotive champion plugs are cheap as chips=0A=0ACheers SG=0A=0A-----Original Message -----=0AFrom: owner-yak-list-server@matronics.com=0A[mailto:owner-yak-list- server@matronics.com] On Behalf Of Yak-List Digest=0AServer=0ASent: Saturda y, 23 May 2009 4:59 PM=0ATo: Yak-List Digest List=0ASubject: Yak-List Diges t: 12 Msgs - 05/22/09=0A=0A*=0A=0A============= =============0A- Online Versions of Today's List Digest Archive=0A=================== =======0A=0AToday's complete Yak-List Digest can also be found in either of the =0Atwo Web Links listed below.- The .html file includes the Digest formatted =0Ain HTML for viewing with a web browser and features Hyperlinked Indexes =0Aand Message Navigation.- The .txt file includes t he plain ASCII version =0Aof the Yak-List Digest and can be viewed with a g eneric text editor =0Asuch as Notepad or with a web browser. =0A=0AHTML Ver sion:=0A=0A=0Ahttp://www.matronics.com/digest/digestview.php?Style=82701& View=html&Chapter=0A 09-05-22&Archive=Yak=0A=0AText Version:=0A=0A =0Ahttp://www.matronics.com/digest/digestview.php?Style=82701&View=txt& Chapter==0A2009-05-22&Archive=Yak=0A=0A=0A========= ===============0A- EMail Version of Today's L ist Digest Archive=0A================== ======0A=0A=0A- - - - - ------------------------------- ---------------------------=0A- - - - - - - - - - - - - Yak-List Digest Archive=0A- - - - - - - - - - - - - - - - - - - ---=0A- - - - - - - - - - Total Messages Posted Fri 05/22/09: 12=0A- - - - - ------ ----------------------------------------------------=0A=0A=0AToday's Messag e Index:=0A----------------------=0A=0A- - 1. 04:25 AM - Re: Still look ing for a snot valve - help- (Scott=0APoehlmann)=0A- - 2. 06:23 AM - Re: Install a GARMIN GPS 296 in a YAK 52 cockpit ?=0A(LawnDart)=0A- - 3 . 09:17 AM - Re: Interference of GPS on Becker VHF- (Bitterlich, Mark=0AG CIV Det Cherry Point, MALS-14 64E)=0A- - 4. 09:41 AM - Re: Still looki ng for a snot valve - help- (doug sapp)=0A- - 5. 09:41 AM - Re: Engin e or prop judder on 18 T- (Bitterlich, Mark G=0ACIV Det Cherry Point, MAL S-14 64E)=0A- - 6. 09:42 AM - Re: Still looking for a snot valve - help - (Herb=0ACoussons)=0A- - 7. 11:12 AM - Re: Still looking for a snot valve - help- (Herb=0ACoussons)=0A- - 8. 11:17 AM - Re: Engine or pro p judder on 18 T- (Roger Kemp M.D.)=0A- - 9. 01:34 PM - Re: Still loo king for a snot valve - help- (doug sapp)=0A- - 10. 05:37 PM - Re: St ill looking for a snot valve - help- (Scott=0APoehlmann)=0A- - 11. 05 :50 PM - Re: Overhauled M14P engines available- (Joe Howse)=0A- - 12. 07:40 PM - Re: Still looking for a snot valve - help- (Herb=0ACoussons) =0A=0A=0A=0A________________________________- Message 1=0A_______________ ______________________=0A=0A=0ATime: 04:25:03 AM PST US=0AFrom: Scott Poehl mann =0ASubject: Re: Yak-List: Still looking for a snot valve - help=0A=0A=0AHi Anthony,=0A=0ASince the volume of the bottle (and t he whole system, in fact) on the 55 =0Ais so low, many do not have separate snot valves. Mine for example only =0Ahas the valve on the bottom of the t ank. I dutifully open it slightly =0Aand drain out the gunk about once a we ek or so (and you don't need to =0Acompletely drain the system, though unti l you get used to doing it =0Aquickly, be prepared to refill the air system ), and at each annual I use =0Athat valve to drain the entire system. It is also the lowest point in =0Athe system, so that's where the gunk ends up. =0A=0AScott=0A=0AYak 55M wrote:=0A> Hi,=0A>=0A> I have finally secured almo st everything I need to add a compressor to =0A> my Yak55M, but I am missin g one more item - a snot valve.- It seems =0A> this little item is diffic ult to get.- Any lines on where I can get a =0A> snot valve would be grea tly appreciated.=0A>=0A> Thanks in advance,=0A>=0A> Anthony.=0A>=0A> BTW, t hanks for all of the advice in finding the sheer coupling and =0A> gauge, t his list made it happen.=0A> *=0A>=0A>=0A> *=0A=0A=0A______________________ __________- Message 2=0A_____________________________________=0A=0A=0ATim e: 06:23:06 AM PST US=0ASubject: Yak-List: Re: Install a GARMIN GPS 296 in a YAK 52 cockpit ?=0AFrom: "LawnDart" =0A=0A=0AI use RA M mounts.- They have one that will mount to the glare shield and=0Ahold t he=0A296.- It is very sturdy and does not vibrate in flight.=0AMount: RAM -B-177-GA7U=0Ahttp://tinyurl.com/pyojro=0A=0AI mounted mine in the center. - Does cover up the artificial horizon when=0Amounted.=0A=0A=0ARead this topic online here:=0A=0Ahttp://forums.matronics.com/viewtopic.php?p=24495 8#244958=0A=0A=0A________________________________- Message 3=0A__________ ___________________________=0A=0A=0ATime: 09:17:48 AM PST US=0ASubject: RE: Yak-List: Interference of GPS on Becker VHF=0AFrom: "Bitterlich, Mark G CI V Det Cherry Point, MALS-14 64E"=0A=0A=0AI am not sure whether I told you this or not Hans, so I might be repeating=0Amyself .=0AIf you put in the filters, make sure you GROUND the SHIELD on the origi nal=0AP lead wire that will then connect to the new filter. =0A=0AMark=0A =0A=0A-----Original Message-----=0AFrom: owner-yak-list-server@matronics.co m=0A[mailto:owner-yak-list-server@matronics.com] On Behalf Of Hans Oortman =0ASent: Thursday, May 21, 2009 3:44 AM=0ASubject: RE: Yak-List: Interferen ce of GPS on Becker VHF=0A=0AMark,=0A=0AThanks for the suggestions. I am go ing to do those in the next few days. We=0Ahave=0Aa few bank holidays any w ay so, time to fly.=0AI ordered the filters, just in case, it certainly won 't hurt to install=0Athese and=0Aat the same time I can check the shielding at the P-lead.=0AI'll keep you updated!=0A=0AHans=0ATel: +31 653 286022=0A =0A=0A________________________________=0A=0AVan: owner-yak-list-server@matr onics.com=0A[mailto:owner-yak-list-server@matronics.com] Namens Yak Pilot =0AVerzonden: donderdag 21 mei 2009 5:37=0AAan: yak-list@matronics.com=0AOn derwerp: Re: Yak-List: Interference of GPS on Becker VHF=0A=0A=0AHans, this is a much better explanation.- Try this.- Next time you go fly,=0Aleav e=0Athe power lead connected for the GPS, but if possible unplug the GPS it self=0Awhile leaving the power cord connected to the aircraft.- Hopefully there is=0Aa=0Adisconnect plug at the GPS itself that would allow you to k eep the GPS power=0Acord=0Aconnected with the actual GPS removed.- Also t ell me what happens if you=0ATURN=0ATHE GPS OFF in flight!- Does this imp act the noise in the radio with the=0Aengine=0Arunning?- If NOT, then for some reason your GPS power cable is either=0Aradiating=0Anoise "somehow" o r is picking noise up and putting it back into wiring=0Awhere it should not be.- =0A=0AWhile unusual, this kind of thing is not unknown.- =0A=0AI suggest replacing your GPS power wire with dual conductor SHIELDED wire=0Aa nd make=0Asure the shield is connected to ground at the power connector sid e only. =0A=0A=0AAlso, reducing RF noise from the Mags by using filters is never a bad idea.=0ABefore=0Ayou do that, PLEASE check the P lead shields r ight at the MAG P LEAD=0ACONNECTOR=0Aand make sure they are not twisted off !- That happens ALL the time, and=0Ayou need to physically check this you rself.- When you unscrew the P lead=0Aconnector=0Aon the mag, be SURE to hold the center of it still as you rotate the knurled=0Aknob or you will tw ist the shield right off.- =0A=0ABest Regards, =0A=0AMark Bitterlich=0A =0A=0A________________________________=0A=0AFrom: Hans Oortman =0ASent: Monday, May 18, 2009 5:12:12 AM=0ASubject: RE: Yak-List: In terference of GPS on Becker VHF=0A=0A=0AMark,=0A=0A=0AThanks for all the go od advise/suggestions. I'll have a look at the=0Ashieldings.=0AWhen you men tioned this, I went back in history and tried to recall when=0Athis=0Apheno ma started to occur. It is only since the last year and a half or so=0Athat =0Athis has become a real problem.=0A=0AI don't fly a lot with gps but when I do, I need it, if you know what I=0Amean.=0A=0AAs far as I can recall it happened after a 100hrs check up (done by our=0ALithuanian=0Amechanic). At the same time, almost 2 years ago, I used the opportunity to=0Ainstall an additional power connector of the Lemo type. These Swiss=0Aconnectors=0Aare the best you can find and have a lock facility build in rather than the=0A normal cigarette lighter connectors which are big and have as good as no=0A locking=0Afacility. I use those Lemo's in my company for equipment we desig n/produce=0Afor cable companies. To make sure that this power lead does not pick up RF,=0AI=0Ainstalled a RF-choke just before the connector.=0A=0AWhe n the engine is not running I hear no interference on any channel on the=0A Becker=0ARadio. The GPS is connected to the YAK52's power and there are no problems=0Awhat so ever.=0A=0AIt is only after I start the engine that the problem occurs as long as I=0Ahave the=0AGPS connected to the planes power. When I disconnect the power lead (a long=0Acurled cable) from the planes p ower the problem is gone. The AvMap IV does=0Ahave=0Aa RF choke in its powe r lead.=0A=0AI was under the impression that the problem was caused by the gps but it is=0Athe=0Acombination of the set up, i.e. engine, radio, gps, w hich causes this=0Aproblem,=0Anot an individual piece of equipment..I think ...and only when the engine is=0Arunning.=0A=0A=0AI'll check the shields of the p-leads on both mags. The tacho generator has=0Aalready=0Abeen checked and the shielding of that device is OK. =0A=0AInstalling these filters won 't hurt any way, so I'll order them, just in=0Acase.=0A=0A=0AThanks for you r help and advise!=0A=0A=0AHans Oortman, MBA, Ph.D.=0A=0ACEO=0A=0ASTN BV=0A =0A________________________________=0A=0AVan: owner-yak-list-server@matroni cs.com=0A[mailto:owner-yak-list-server@matronics.com] Namens Yak Pilot=0AVe rzonden: maandag 18 mei 2009 7:53=0AAan: yak-list@matronics.com=0AOnderwerp : Re: Yak-List: Interference of GPS on Becker VHF=0A=0A=0ALet me clarify a little here.- There is a shielded P lead wire.- The center=0Aconductor =0Ais soldered to a little device that fits into the mag itself and makes =0Aan internal connection to the mag coil.- You push this into the mag P lead=0Ahole=0Aand THEN screw on the outer shell per se.- =0A=0A=0AThe shi eld for this wire is soldered to a wire CUP that fits into the screw=0Aon =0Aportion of the mag P lead connector AKA "The Shell".- When you screw i n the=0AP=0Alead connector onto the mag, or OFF of the mag, it is very easy to turn the=0Athreaded=0Aportion and ALSO turn the little piece that is so ldered to the shield.=0AIf you DO turn this little piece as you screw off t he threaded portion of=0Athe=0AP lead connector, you will also twist the sh ield, and in so-doing will cause=0Athe shield to rip off from the connector .- Thus the shield is no longer=0Aconnected=0Aand there is no ground for it.- =0A=0A=0AIt is like MASSIVELY EASY to do this!- EVERY SINGLE AIRCR AFT USING AN M-14=0AENGINE=0AI HAVE EVER SEEN HAS AT LEAST SOME DAMAGE IN T HIS AREA!- Every single one.=0AThis WILL cause radio noise.- Every time .- (Hans, your problem is likely=0Asomething=0Aelse) =0A=0A=0AThe only wa y to avoid doing it is to "somehow" carefully hold that cup piece=0Athat=0A sticks out the back of the threaded portion of the connector (the NUT per =0Ase)=0Astill as you turn the piece that screws off with your hand.- I h ave a=0Aspecial=0Atool made to do this.- You can use needle nose pliers i f you are careful. =0ABut if you ignore this advice and take off a P lead c onnector... you have=0AVERY=0AHIGH ODDS of damaging the shield.- =0A=0A =0ARest assured, if you didn't know this, it is even money that your P lead =0Ashields=0Aare at the very minimum "damaged" if not completely broken. =0A=0A=0AMark=0A=0A=0A________________________________=0A=0AFrom: Yak Pilot =0ASent: Monday, May 18, 2009 12:47:56 AM=0ASubject: Re: Yak-List: Interference of GPS on Becker VHF=0A=0AOne of the most common so urces of interference to radios is from the P=0Aleads. =0AOne of the most c ommon causes for that is the loss of a ground for the=0Ashield.=0AThe way t his happens is when you unscrew the P lead connector on the mag=0Aitself, =0Ayou do not also hold the shield cup on the back of the P lead connector =0Astill=0Aas you unscrew the P lead connector itself.- The result of thi s is that you=0Aend up twisting the shield right off the connector. =0A=0A =0AWhen you do this, the shield is no longer grounded.- If the shield is not=0Agrounded,=0Ait will radiate noise just like there was no shield there to begin with and=0Ayour radios will be filled with static and noise.- =0A=0A=0ASo, before you go out and install any kind of filters, ALWAYS make sure that=0Ayour=0AP LEAD shields are indeed correctly soldered and attach ed to the P lead=0Aconnector=0Aitself.- =0A=0A=0AIf everything is ok in t hat department and you still have noise and decide=0Ato try=0Aa P lead filt er, install it any way you choose, but make certain that when=0Ayou are don e, the P lead shield itself still has a proper ground on it, if=0Anot=0Aat the P lead connector itself, then in some other manner as you see fit.=0ADo =0Anot allow the P lead wire shield "float", and keep the amount of unshiel ded=0AP=0Alead wire as short as possible when installing a filter and keep the length=0Aof=0Athe wire from the P lead shield to ground as short as pos sible as well.- =0A=0A=0AAnother terrific source of noise is the Tach Gen , and if the shield on that=0Awire=0Abundle breaks, the noise can be so str ong it will burn out the receiver on a=0ABalkan 5.- =0A=0A=0AMark Bitterl ich=0A=0A=0A________________________________=0A=0AFrom: Roger Kemp M.D. =0ASent: Monday, May 18, 2009 11:10:52 AM=0ASubject: RE: Yak-List: Interference of GPS on Becker VHF=0A=0ATwo magneto filters ar e required.=0A=0ADoc=0A=0A=0AFrom: owner-yak-list-server@matronics.com=0A[m ailto:owner-yak-list-server@matronics.com] On Behalf Of A. Dennis Savarese =0ASent: Sunday, May 17, 2009 8:26 AM=0ASubject: Re: Yak-List: Interference of GPS on Becker VHF=0A=0A=0AYes, we installed both filters.=0A=0ADennis =0A=0A--- ----- Original Message ----- =0A=0A--- From: Hans Oor tman - =0A=0A--- To: yak-list@matronics.c om =0A=0A--- Sent: Sunday, May 17, 2009 8:22 AM=0A=0A--- Subjec t: RE: Yak-List: Interference of GPS on Becker VHF=0A=0A--- =0A=0A- -- Dennis,=0A=0A--- =0A=0A--- Did you install the in-line f ilter as well as the magneto filter??=0A=0A--- =0A=0A--- Hans =0A=0A--- =0A=0A--- =0A________________________________=0A=0A =0A--- Van: owner-yak-list-server@matronics.com=0A[mailto:owner-yak-l ist-server@matronics.com] Namens A. Dennis Savarese=0A--- Verzonden: zondag 17 mei 2009 15:03=0A--- Aan: yak-list@matronics.com=0A-- - Onderwerp: Re: Yak-List: Interference of GPS on Becker VHF=0A=0A-- - We recently had a problem with Doc's Yak 50 with noise on the Becker=0A VHF.- First we installed a nice inline filter on the DC buss;=0Ahttp://ww w.lonestaraviation.com/product_details.asp?Product_Name=The%20Elimi=0Anat or.- It removed much of the noise, but not all.- Then we installed the =0Amagneto filters directly on the P leads going into the magnetos.=0Ahttp: //www.lonestaraviation.com/product_details.asp?Product_Name=Magneto%20F =0Ailter.- Bingo.....noise eliminated.- I mounted the ground strap to t he studs=0Aon the accessory case back plate.=0A=0A--- Dennis=0A=0A- -- =0A=0A--- --- ----- Original Message ----- =0A=0A-- - --- From: Hans Oortman - =0A=0A-- - --- To: yak-list@matronics.com =0A=0A--- --- Sent: Su nday, May 17, 2009 7:42 AM=0A=0A--- --- Subject: Yak-List: Inte rference of GPS on Becker VHF=0A=0A--- --- =0A=0A--- - -- Guys,=0A=0A--- --- =0A=0A--- --- May be some of you on the yak net has some idea how to=0Aresolve the following=0Aprobl em. Mark any suggestions??=0A=0A--- --- =0A=0A--- -- - I own a Avmap IV GPS, great tool but it is getting a=0Anuisance in the 52.=0A=0A--- --- =0A=0A--- --- The following happen s: when on the ground GPS switched on,=0AVHF on, engine NOT=0Arunning, no i nterference on VHF at all!=0A=0A--- --- - - - - - - - - - - - - - - - - - when on the ground GPS=0Aswitc hed on, VHF on,=0Aengine running (or in the air for that matter), huge inte rference on VHF, S5=0Ato 6 noise level, i.e. very difficult comms. When swi tching over on battery=0A(i.e.=0Apulling the plug out...) the problem is as good as gone.=0A=0A--- --- =0A=0A--- --- Has any b ody had this experience also and what have you done=0Aabout it?- I am=0At hinking on a LPF or a separate DC-DC convertor for the AvMap GPS.=0A=0A- -- --- In principle the AvMap swallows any voltage between 10 and =0A36v. I assume that=0Athe 28v generator is not producing a nice DC which causes something to start=0Agenerating a noise, in my case the GPS but I do not have an explanation for=0Athat=0Aat all....=0A=0A--- --- =0A=0A--- --- Any help is appreciated!=0A=0A--- --- =0A=0A--- --- Hans =0A=0A--- --- RA3326K / EHSE=0A =0A--- --- - =0A--- --- - =0A--- =0Ahref ="http://www.matronics.com/Navigator?Yak-List">http://www.matronhref="h t=0Atp://forums.matronics.com">http://forums.matronics.com=0A--- =0Ah ref="http://www.matronics.com/contribution">http://www.matronics.com/c=0A =0A--- - =0A--- - =0A--- =0Ahref="http://www.matron ics.com/Navigator?Yak-List">http://www.matronhref="ht=0Atp://forums.matro nics.com">http://forums.matronics.com=0A--- =0Ahref="http://www.mat ronics.com/contribution">http://www.matronics.com/c=0A--- - =0A- -- - =0A--- =0Ahref="http://www.matronics.com/Navigator?Yak-L ist">http://www.matronics.com/=0ANavigator?Yak-List=0A--- href="htt p://forums.matronics.com">http://forums.matronics.com=0A--- =0Ahref ="http://www.matronics.com/contribution">http://www.matronics.com/c=0A=0A =0Ahttp://www.matronics.com/Navigator?Yak-List=0Ahttp://forums.matronics.co m=0Ahttp://www.matronics.com/contribution=0A=0Ahttp://www.matronics.com/Nav igator?Yak-Lisnics.com/contribution"=0Atarget=_blank rel=nofollow>http: //www.matronics.com/contribution=0A===========- - =0Ahttp:====================== ==- - =0A=0A=0Ahttp://www.matronics.com/Navigator?Yak-List=0Ahttp:/ /forums.matronics.com=0Ahttp://www.matronics.com/contribution=0A=0A=- - -> http://www.matronics.com/Navigator?Yak-List- _=0Ahref="http://forums .matronics.com/" target=_blank=0Arel=nofollow>http:====== ===- - =0A=0A=0Ahref="http://www.matronics.com/Navigator?Yak-Li st">http://www.matronics.com/=0ANavigator?Yak-List=0Ahref="http://forums. matronics.com">http://forums.matronics.com=0Ahref="http://www.matronics.c om/contribution">http://www.matronics.com/c=0A=0A=0A_______________________ _________- Message 4=0A_____________________________________=0A=0A=0ATime : 09:41:40 AM PST US=0ASubject: Re: Yak-List: Still looking for a snot valv e - help=0AFrom: doug sapp =0A=0AAs always your mile age may vary but the thought of a rusted or corroded air=0Abottle exploding in a aircraft really chills my crap!, in my mind it is=0Asimply is not wor th the chance.- Add to this the fact that your pushing all=0Athe moisture and gunk into your expensive start valve and check valves which=0Ais just not a good deal even if you have replaced all the springs with=0Astainless steel.- IMHO the added cost of a snot valve AND a dessicant filter=0Awill save you a bunch of money and trouble down the road.=0AAlways Yakin,=0ADou g=0A=0AOn Fri, May 22, 2009 at 4:23 AM, Scott Poehlmann wrote:=0A=0A>=0A> Hi Anthony,=0A>=0A> Since the volume of the bottle (and the whole system, in fact) on the 55=0Ais=0A> so low, many do not have sepa rate snot valves. Mine for example only has=0Athe=0A> valve on the bottom o f the tank. I dutifully open it slightly and drain=0Aout=0A> the gunk about once a week or so (and you don't need to completely drain=0Athe=0A> system , though until you get used to doing it quickly, be prepared to=0Arefill=0A > the air system), and at each annual I use that valve to drain the entire =0A> system. It is also the lowest point in the system, so that's where the =0Agunk=0A> ends up.=0A>=0A> Scott=0A>=0A>=0A> Yak 55M wrote:=0A>=0A>> Hi, =0A>>=0A>> I have finally secured almost everything I need to add a compres sor to my=0A>> Yak55M, but I am missing one more item - a snot valve.- It seems this=0Alittle=0A>> item is difficult to get.- Any lines on where I can get a snot valve=0Awould=0A>> be greatly appreciated.=0A>>=0A>> Thanks in advance,=0A>>=0A>> Anthony.=0A>>=0A>> BTW, thanks for all of the advice in finding the sheer coupling and=0Agauge,=0A>> this list made it happen. =0A>> *=0A>>=0A>>=0A>> *=0A>>=0A>=0A>=0A=0A=0A-- =0AAlways Yakin,=0ADoug Sa pp=0APhone 509-826-4610=0AFax 509-826-3644=0A=0A___________________________ _____- Message 5=0A_____________________________________=0A=0A=0ATime: 09 :41:43 AM PST US=0ASubject: RE: Yak-List: Engine or prop judder on 18 T=0AF rom: "Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E"=0A=0A=0AThis might sound especially stupid and I hesitate to eve n mention it,=0Abut.....=0AI recently had a very interesting problem in my YAK-50.- Along with it=0Abecoming=0Avery difficult to start when hot, it also developed a very noticeable shake=0Aat high speeds.- Pretty much exa ctly as you described which is why I am=0Aabout=0Ato go out on a limb and j ust mention what happened to me. =0A=0AAnyway, after a full year of problem s with the M-14 not wanting to start=0Awhen hot,=0Aand after replacing ever y single piece of the starter ignition system, the=0Aonly thing left was th e spark plugs.- I am using automotive plugs via=0ADennis's=0Akit, which b y the way is the best thing since sliced bread.- =0A=0ASo, I replaced the plugs.- The starting problem went away and all is now=0Awell.=0AI really had a hard time believing it was the plugs.- Still do in fact, but=0Athe =0Afact is.... The problem is GONE!- =0A=0AANYWAY ~ Funny thing.- The h igh speed vibration went away too.- Mag checks=0Aduring=0Aall of this wer e always good.- No indication of plug problems at all.- Upon=0Ainspecti on, found that the plug gap was set too wide ... My fault for not=0Adouble =0Achecking the A&P that was helping me put in the kit way back when.- Th e=0Aplugs=0Awere at .032 or so.- Dennis recommends .025- I have talked to other folks=0Awho claim .018 is about right, and that wider than .018 ca n cause "starting=0Aproblems".=0AI have mine now gapped at .025 per Dennis' s recommendation and everything=0Ais working perfectly, so I will avoid .01 8, but it is worth keeping in=0Athe back of your head.- =0A=0AAnyway... T o get to the point... It's a real long shot, but you might have a=0Aspark =0Aplug problem, or some other sort of ignition problem, especially if you are=0Ausing the original ignition wiring and ring.- =0A=0AMark Bitterlich =0A=0A=0A-----Original Message-----=0AFrom: owner-yak-list-server@matronics .com=0A[mailto:owner-yak-list-server@matronics.com] On Behalf Of Vic=0ASent : Tuesday, May 19, 2009 5:26 PM=0ASubject: Yak-List: Engine or prop judder on 18 T=0A=0A=0AHello everybody,=0A=0Aour 18 T has developed an engine or p rop judder since last year that can be=0Anoticed=0Amainly in high speed low passes at , say, 70 % engine speed and over 250=0Akph . We replaced all en gine mounting rubbers, did a dynamic prop balancing=0Aon=0Athe ground with up to 90 % engine speed and the engine felt real smooth. But=0Ain the air a t high speed dives the shaking of the engine/prop was still=0Athere=0A- at a very reduced rate, but still noticeable . The setting of the blades=0Awas =0Achecked and seemed to be allright in the dynamic balancing . Could we ha ve a=0Aproblem with the prop hub in case the prop goes to fully coarse in t he dive=0Aand=0Athe blade angles in this condition might be different for e ach blade ? We=0Asuspect=0Asome sort of backlash in the hub different for e ach side ? Has anybody an=0Aidea on that one ? Or could it be an aerodynami c effect specific for the 18=0AT ? We will dig deeper next weekend but any ideas would be appreciated. =0A=0A- - - - - - - - - - - - - - - - - - - - - Regards=0A- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Helga and Vic=0A=0A=0ARead this topic online h ere:=0A=0Ahttp://forums.matronics.com/viewtopic.php?p=244696#244696=0A=0A =0A________________________________- Message 6=0A________________________ _____________=0A=0A=0ATime: 09:42:52 AM PST US=0AFrom: Herb Coussons =0ASubject: Re: Yak-List: Still looking for a snot valve - help =0A=0A=0AExact same for me, the low point drain for the bottom of the air t ank- =0Ais mounted just on the Left of the oil cooler doghouse.- Althou gh it- =0Awould be nice to have a separate valve to relaesa without dumpi ng the- =0Aair.=0A=0A=0AHerb=0A=0A=0AOn May 22, 2009, at 6:23 AM, Scott P oehlmann wrote:=0A=0A>=0A> Hi Anthony,=0A>=0A> Since the volume of the bott le (and the whole system, in fact) on- =0A> the 55 is so low, many do not have separate snot valves. Mine for- =0A> example only has the valve on the bottom of the tank. I dutifully- =0A> open it slightly and drain out the gunk about once a week or so (and- =0A> you don't need to completely drain the system, though until you get- =0A> used to doing it quickly, be prepared to refill the air system), and- =0A> at each annual I use that valve to drain the entire system. It is- =0A> also the lowest point in th e system, so that's where the gunk ends up.=0A>=0A> Scott=0A>=0A> Yak 55M w rote:=0A>> Hi,=0A>>=0A>> I have finally secured almost everything I need to add a compressor- =0A>> to my Yak55M, but I am missing one more item - a snot valve.- It- =0A>> seems this little item is difficult to get.- Any lines on where I- =0A>> can get a snot valve would be greatly appreci ated.=0A>>=0A>> Thanks in advance,=0A>>=0A>> Anthony.=0A>>=0A>> BTW, thanks for all of the advice in finding the sheer coupling and- =0A>> gauge, th is list made it happen.=0A>> *=0A>>=0A>>=0A>> *=0A>=0A>=0A=0A=0A___________ _____________________- Message 7=0A_____________________________________ =0A=0A=0ATime: 11:12:04 AM PST US=0AFrom: Herb Coussons =0A Subject: Re: Yak-List: Still looking for a snot valve - help=0A=0ADoug,=0AI f you are familiar with the yak 55 system (maybe they are all unique- =0A as they are each a retrofit), please describe the plumbing- to add the- =0Asnot valve.=0AHas any body thought of adding a valve like the Wilga.- My Yak 52 TW- =0Ahas the pull handle is in the cockpit to release the va lve.- On the- =0AWilga it was up front behind the right cowl cheek - a screw type valve- =0Athat released right there.- Which of these types i s more like the CJ- =0Aor standard Yak?=0A=0AI would think the Wilga type would be the easiest to plumb for the 55- =0Asince the whole air system is in front of the firewall except the fill- =0Aport and guage.=0A=0A=0AT hanks,=0A=0AHerb=0A=0A=0AOn May 22, 2009, at 11:29 AM, doug sapp wrote:=0A =0A> As always your mileage may vary but the thought of a rusted or- =0A> corroded air bottle exploding in a aircraft really chills my crap!,- =0A > in my mind it is simply is not worth the chance.- Add to this the- =0A> fact that your pushing all the moisture and gunk into your expensive - =0A> start valve and check valves which is just not a good deal even if - =0A> you have replaced all the springs with stainless steel.- IMHO th e- =0A> added cost of a snot valve AND a dessicant filter will save you a - =0A> bunch of money and trouble down the road.=0A>=0A> Always Yakin,=0A > Doug=0A>=0A> On Fri, May 22, 2009 at 4:23 AM, Scott Poehlmann - =0A> wrote:=0A>=0A> Hi Anthony,=0A>=0A> Since the volume of the bottle (and the whole system, in fact) on- =0A> the 55 is so low, many d o not have separate snot valves. Mine for- =0A> example only has the valv e on the bottom of the tank. I dutifully- =0A> open it slightly and drain out the gunk about once a week or so (and- =0A> you don't need to comple tely drain the system, though until you get- =0A> used to doing it quickl y, be prepared to refill the air system), and- =0A> at each annual I use that valve to drain the entire system. It is- =0A> also the lowest point in the system, so that's where the gunk ends up.=0A>=0A> Scott=0A>=0A>=0A> Yak 55M wrote:=0A> Hi,=0A>=0A> I have finally secured almost everything I n eed to add a compressor- =0A> to my Yak55M, but I am missing one more ite m - a snot valve.- It- =0A> seems this little item is difficult to get. - Any lines on where I- =0A> can get a snot valve would be greatly appr eciated.=0A>=0A> Thanks in advance,=0A>=0A> Anthony.=0A>=0A> BTW, thanks fo r all of the advice in finding the sheer coupling and- =0A> gauge, this l ist made it happen.=0A> *=0A>=0A>=0A> *=0A>=0A> ========= ==0A> rget="_blank">http://www.matronics.com/Navigator?Yak-List=0A> = ==========0A> http://forums.matronics.com=0A> === ========0A> le, List Admin.=0A> ="_blank">http://www.matron ics.com/contribution=0A> ===========0A>=0A>=0A> -- =0A> Always Yakin,=0A> Doug Sapp=0A> Phone 509-826-4610=0A> Fax 509-826-3644=0A >=0A>=0A=0A=0A________________________________- Message 8=0A_____________ ________________________=0A=0A=0ATime: 11:17:24 AM PST US=0AFrom: "Roger Ke mp M.D." =0ASubject: RE: Yak-List: Engine or prop judder on 18 T=0A=0A=0AA glow plug. Quite possible...did not think of that one. The exact way a=0Adiesel engine or R/C model airplane engine runs...we ll used to before=0Aturbines and 4 stroke chainsaw engines were introduced the modeling=0Acommunities. =0ADoc=0A=0A-----Original Message-----=0AFrom: owner-yak-list-server@matronics.com=0A[mailto:owner-yak-list-server@matroni cs.com] On Behalf Of Bitterlich, Mark G=0ACIV Det Cherry Point, MALS-14 64E =0ASent: Friday, May 22, 2009 11:30 AM=0ASubject: RE: Yak-List: Engine or p rop judder on 18 T=0A=0AThis might sound especially stupid and I hesitate t o even mention it,=0Abut.....- I recently had a very interesting problem in my YAK-50.- Along=0Awith it becoming very difficult to start when hot, it also developed a very=0Anoticeable shake at high speeds.- Pretty much exactly as you described which=0Ais why I am about to go out on a limb and just mention what happened to me. =0A=0AAnyway, after a full year of probl ems with the M-14 not wanting to start=0Awhen hot, and after replacing ever y single piece of the starter ignition=0Asystem, the only thing left was th e spark plugs.- I am using automotive=0Aplugs via Dennis's kit, which by the way is the best thing since sliced=0Abread.- =0A=0ASo, I replaced the plugs.- The starting problem went away and all is now=0Awell.- I reall y had a hard time believing it was the plugs.- Still do in=0Afact, but th e fact is.... The problem is GONE!- =0A=0AANYWAY ~ Funny thing.- The hi gh speed vibration went away too.- Mag checks=0Aduring all of this were a lways good.- No indication of plug problems at all.=0AUpon inspection, fo und that the plug gap was set too wide ... My fault for=0Anot double checki ng the A&P that was helping me put in the kit way back=0Awhen.- The plugs were at .032 or so.- Dennis recommends .025- I have talked=0Ato other folks who claim .018 is about right, and that wider than .018 can=0Acause " starting problems".- I have mine now gapped at .025 per Dennis's=0Arecomm endation and everything is working perfectly, so I will avoid .018,=0Abut i t is worth keeping in the back of your head.- =0A=0AAnyway... To get to t he point... It's a real long shot, but you might have a=0Aspark plug proble m, or some other sort of ignition problem, especially if=0Ayou are using th e original ignition wiring and ring.- =0A=0AMark Bitterlich=0A=0A=0A----- Original Message-----=0AFrom: owner-yak-list-server@matronics.com=0A[mailto :owner-yak-list-server@matronics.com] On Behalf Of Vic=0ASent: Tuesday, May 19, 2009 5:26 PM=0ASubject: Yak-List: Engine or prop judder on 18 T=0A=0A =0AHello everybody,=0A=0Aour 18 T has developed an engine or prop judder si nce last year that can be=0Anoticed mainly in high speed low passes at , sa y, 70 % engine speed and over=0A250 kph . We replaced all engine mounting r ubbers, did a dynamic prop=0Abalancing on the ground with up to 90 % engine speed and the engine felt=0Areal smooth. But in the air at high speed dive s the shaking of the=0Aengine/prop was still there - at a very reduced rate , but still noticeable .=0AThe setting of the blades was checked and seemed to be allright in the=0Adynamic balancing . Could we have a problem with t he prop hub in case the=0Aprop goes to fully coarse in the dive and the bla de angles in this condition=0Amight be different for each blade ? We suspec t some sort of backlash in the=0Ahub different for each side ? Has anybody an idea on that one ? Or could it=0Abe an aerodynamic effect specific for t he 18 T ? We will dig deeper next=0Aweekend but any ideas would be apprecia ted. =0A=0A- - - - - - - - - - - - - - - - - - - - - Regards=0A- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Helga and Vic=0A=0A=0ARead this topic online here:=0A=0Ahttp://forums. matronics.com/viewtopic.php?p=244696#244696=0A=0A=0A_____________________ ___________- Message 9=0A_____________________________________=0A=0A=0ATi me: 01:34:43 PM PST US=0ASubject: Re: Yak-List: Still looking for a snot va lve - help=0AFrom: doug sapp =0A=0AHerb,Am really no t sure of the plumbing on the 55 or the 52 for that matter.=0AFrom your des cription the Wilga snot valve sounds like the one used on a CJ=0Awherein yo u reach inside the cowl and turn the knob/wheel and depending on=0Awhich wa y the wind is blowing it blows crap all over your right leg or foot.=0ATo a dd a snot valve to any system is not difficult and I have the valves=0Aand most if not all the fitting here in my stock.- Give me a call if I can=0A be of help. 509-826-4610=0A=0AI will be at Red Star 24th--the 1st.=0A=0AAlw ays Yakin,=0ADoug=0A=0AOn Fri, May 22, 2009 at 11:09 AM, Herb Coussons wrote:=0A=0A> Doug,If you are familiar with the yak 55 system (maybe they are all unique=0A> as they are each a retrofit), please describ e the plumbing- to add the=0Asnot=0A> valve.=0A> Has any body thought of adding a valve like the Wilga.- My Yak 52 TW has=0A> the pull handle is i n the cockpit to release the valve.- On the Wilga it=0Awas=0A> up front b ehind the right cowl cheek - a screw type valve that released=0A> right the re.- Which of these types is more like the CJ or standard Yak?=0A>=0A> I would think the Wilga type would be the easiest to plumb for the 55=0Asince =0A> the whole air system is in front of the firewall except the fill port and=0A> guage.=0A>=0A>=0A> Thanks,=0A>=0A> Herb=0A>=0A>=0A> On May 22, 2009 , at 11:29 AM, doug sapp wrote:=0A>=0A> As always your mileage may vary but the thought of a rusted or corroded=0Aair=0A> bottle exploding in a aircra ft really chills my crap!, in my mind it is=0A> simply is not worth the cha nce.- Add to this the fact that your pushing=0Aall=0A> the moisture and g unk into your expensive start valve and check valves=0Awhich=0A> is just no t a good deal even if you have replaced all the springs with=0A> stainless steel.- IMHO the added cost of a snot valve AND a dessicant=0Afilter=0A> will save you a bunch of money and trouble down the road.=0A> Always Yakin, =0A> Doug=0A>=0A> On Fri, May 22, 2009 at 4:23 AM, Scott Poehlmann wrote:=0A>=0A>>=0A>> Hi Anthony,=0A>>=0A>> Since the volume of t he bottle (and the whole system, in fact) on the 55=0A>> is so low, many do not have separate snot valves. Mine for example only=0Ahas=0A>> the valve on the bottom of the tank. I dutifully open it slightly and=0Adrain=0A>> ou t the gunk about once a week or so (and you don't need to completely=0Adrai n=0A>> the system, though until you get used to doing it quickly, be prepar ed to=0A>> refill the air system), and at each annual I use that valve to d rain the=0A>> entire system. It is also the lowest point in the system, so that's where=0A>> the gunk ends up.=0A>>=0A>> Scott=0A>>=0A>>=0A>> Yak 55M wrote:=0A>>=0A>>> Hi,=0A>>>=0A>>> I have finally secured almost everything I need to add a compressor to=0Amy=0A>>> Yak55M, but I am missing one more item - a snot valve.- It seems this=0Alittle=0A>>> item is difficult to g et.- Any lines on where I can get a snot valve=0Awould=0A>>> be greatly a ppreciated.=0A>>>=0A>>> Thanks in advance,=0A>>>=0A>>> Anthony.=0A>>>=0A>>> BTW, thanks for all of the advice in finding the sheer coupling and=0A>>> gauge, this list made it happen.=0A>>> *=0A>>>=0A>>>=0A>>> *=0A>>>=0A>>=0A> > ===========0A>> rget="_blank">http://www.matronics. com/Navigator?Yak-List=0A>> ===========0A>> http://foru ms.matronics.com=0A>> ===========0A>> le, List Admin. =0A>> ="_blank">http://www.matronics.com/contribution=0A>> ==== =======0A>>=0A>>=0A>>=0A>>=0A>=0A>=0A> --=0A> Always Yakin,=0A> Doug Sapp=0A> Phone 509-826-4610=0A> Fax 509-826-3644=0A>=0A>=0A*href="h ttp://www.matronics.com/Navigator?Yak-List">http://www.matronics.com=0A/Nav igator?Yak-List=0A> href="http://forums.matronics.com">http://forums.matr onics.com=0A>=0Ahref="http://www.matronics.com/contribution">http://www.m atronics.com/contri=0Abution=0A> *=0A>=0A>=0A> *=0A>=0A>=0A=0A=0A-- =0AAlwa ys Yakin,=0ADoug Sapp=0APhone 509-826-4610=0AFax 509-826-3644=0A=0A________ ________________________- Message 10=0A__________________________________ __=0A=0A=0ATime: 05:37:41 PM PST US=0AFrom: Scott Poehlmann =0ASubject: Re: Yak-List: Still looking for a snot valve - help=0A=0A =0AHi Dennis,=0A=0AI agree with your concern, but the system in a most 55's is different =0Athan that in the 52 (or even the 50). First off, I (and mo st others) =0Ahave an overboard dump line--99% of the time the compressor i s pumping =0Aair overboard and NOT through the system, thus most of the tim e the =0Asystem is sealed. I dutifully check for "snot" but essentially NEV ER get =0Aanything out. Second, the system ONLY operates the starter--thus the =0Alines are short and relatively straight--in fact my entire air syste m is =0Aon the engine side of the firewall except for the line to the cockp it =0Apressure guage. Third, I at least have my tank visually inspected eve ry =0Aother annual or so, so I know it isn't corroded (as a gynecologist, I =0Afind it fascinating that the exact same instrument I call a "diagnostic =0Ahysteroscope" and which costs over $15,000 can be had by an A&P for < =0A$500 when it is called a "flexible boroscope"... but that's another =0Ad iscussion...). Given these things, I don't think that using the tank =0Abot tom drain valve as the snot valve is unreasonable--adding such a =0Avalve w ould just give me another point from which the system could leak. =0ABut th e concern about corrosion is very real--just one look at the 52 =0Afrom Eng land that had the bottle explode is enough to convince me!=0A=0ABest,=0A=0A Scott=0A=0Adoug sapp wrote:=0A> As always your mileage may vary but the tho ught of a rusted or =0A> corroded air bottle exploding in a aircraft really chills my crap!, in =0A> my mind it is simply is not worth the chance.- Add to this the fact =0A> that your pushing all the moisture and gunk into your expensive start =0A> valve and check valves which is just not a good d eal even if you have =0A> replaced all the springs with stainless steel.- IMHO the added cost of =0A> a snot valve AND a dessicant filter will save you a bunch of money and =0A> trouble down the road.- =0A>=0A> Always Yak in,=0A> Doug=0A>=0A> On Fri, May 22, 2009 at 4:23 AM, Scott Poehlmann > wrote:=0A>=0A>- - >=0A>=0A>- - Hi Anthony,=0A>=0A>- - Since the v olume of the bottle (and the whole system, in fact) on=0A>- - the 55 is so low, many do not have separate snot valves. Mine for=0A>- - example only has the valve on the bottom of the tank. I dutifully=0A>- - open it slightly and drain out the gunk about once a week or so=0A>- - (and you don't need to completely drain the system, though until=0A>- - you get used to doing it quickly, be prepared to refill the air=0A>- - syst em), and at each annual I use that valve to drain the entire=0A>- - sys tem. It is also the lowest point in the system, so that's where=0A>- - the gunk ends up.=0A>=0A>- - Scott=0A>=0A>=0A>- - Yak 55M wrote:=0A >=0A>- - - - Hi,=0A>=0A>- - - - I have finally secured almo st everything I need to add a=0A>- - - - compressor to my Yak55M, b ut I am missing one more item - a=0A>- - - - snot valve.- It seem s this little item is difficult to get.=0A>- - - - - Any lines on where I can get a snot valve would be greatly=0A>- - - - appreciat ed.=0A>=0A>- - - - Thanks in advance,=0A>=0A>- - - - Anthon y.=0A>=0A>- - - - BTW, thanks for all of the advice in finding the sheer=0A>- - - - coupling and gauge, this list made it happen.=0A> - - - - *=0A>=0A>=0A>- - - - *=0A>=0A>=0A>- - === ========0A>- - rget="_blank">http://www.matronics.com/N avigator?Yak-List=0A>- - ===========0A>- - http ://forums.matronics.com=0A>- - ===========0A>- - le, List Admin.=0A>- - ="_blank">http://www.matronics.com/contrib ution=0A>- - ===========0A>=0A>=0A> -- =0A> Always Yakin,=0A> Doug Sapp=0A> Phone 509-826-4610=0A> Fax 509-826-3644=0A> *=0A> =0A>=0A> *=0A=0A=0A________________________________- Message 11=0A_______ _____________________________=0A=0A=0ATime: 05:50:33 PM PST US=0AFrom: "Joe Howse" =0ASubject: Re: Yak-List: Overhauled M14P engines ava ilable=0A=0ADenni=0A=0AHow much?=0A=0AJoe=0A- ----- Original Message ---- - =0A- From: A. Dennis Savarese =0A- To: yak-list@matronics.com ; m14pe ngines-list@matronics.com =0A- Sent: Tuesday, May 19, 2009 5:50 AM=0A- Subject: Yak-List: Overhauled M14P engines available=0A=0A=0A- If anyone is interested in an overhauled M14P engine with prop flange =0Afor V530 or MTV 9 propeller, overhauled by SC Motorstar in 2008 with =0Aoverhaul paperw ork, please contact me off-list.- I have 3 engines =0Aavailable.- They are here in the US and presently stored in a climate =0Acontrolled storage facility in Alabama.=0A=0A- I will be happy to discuss a serviceable core exchange with you as =0Awell.=0A- Dennis=0A=0A=0A_______________________ _________- Message 12=0A____________________________________=0A=0A=0ATime : 07:40:39 PM PST US=0AFrom: Herb Coussons =0ASubject: Re: Yak-List: Still looking for a snot valve - help=0A=0A=0AAre you kidding - a gynecologist?=0AMe too!- And I actually have used a flexible hysteroscop e on an- =0Aairplane.=0A=0A=0AI have the same experience with the 55, I g et hardly any return when I- =0Ause the valve connected to the bottom of the tank.- Whereas the CJ- =0Adescription that Doug gave, turning the k nob behind the cowl on the- =0AWilga dumped the biggest mess you can imag ine.=0A=0AHerb Coussons=0A=0A=0AOn May 22, 2009, at 7:35 PM, Scott Poehlman n wrote:=0A=0A>=0A> Hi Dennis,=0A>=0A> I agree with your concern, but the s ystem in a most 55's is- =0A> different than that in the 52 (or even the 50). First off, I (and- =0A> most others) have an overboard dump line--99 % of the time the- =0A> compressor is pumping air overboard and NOT throu gh the system, thus- =0A> most of the time the system is sealed. I dutifu lly check for "snot"- =0A> but essentially NEVER get anything out. Second , the system ONLY- =0A> operates the starter--thus the lines are short an d relatively- =0A> straight--in fact my entire air system is on the engin e side of the- =0A> firewall except for the line to the cockpit pressure guage. Third, I- =0A> at least have my tank visually inspected every othe r annual or so,- =0A> so I know it isn't corroded (as a gynecologist, I f ind it- =0A> fascinating that the exact same instrument I call a "diagnos tic- =0A> hysteroscope" and which costs over $15,000 can be had by an A&P for- =0A> < $500 when it is called a "flexible boroscope"... but that's - =0A> another discussion...). Given these things, I don't think that usi ng- =0A> the tank bottom drain valve as the snot valve is unreasonable-- =0A> adding such a valve would just give me another point from which the- =0A> system could leak. But the concern about corrosion is very real-- =0A > just one look at the 52 from England that had the bottle explode is- =0A> enough to convince me!=0A>=0A> Best,=0A>=0A> Scott=0A>=0A> doug sapp w rote:=0A>> As always your mileage may vary but the thought of a rusted or - =0A>> corroded air bottle exploding in a aircraft really chills my crap !,- =0A>> in my mind it is simply is not worth the chance.- Add to this the- =0A>> fact that your pushing all the moisture and gunk into your- =0A>> expensive start valve and check valves which is just not a good- =0A>> deal even if you have replaced all the springs with stainless- =0A> > steel.- IMHO the added cost of a snot valve AND a dessicant filter- =0A>> will save you a bunch of money and trouble down the road.=0A>> Always Yakin,=0A>> Doug=0A>>=0A>> On Fri, May 22, 2009 at 4:23 AM, Scott Poehlman n > > wrote:=0A>>=0A>> - - >=0A>>=0A>>- - Hi Anthony,=0A>>=0A>> - - Since the volume of the bottle (and the whole system, in fact) on =0A>>- - the 55 is so low, many do not have separate snot valves. Mine for=0A>>- - example only has the valve on the bottom of the tank. I dut ifully=0A>>- - open it slightly and drain out the gunk about once a wee k or so=0A>>- - (and you don't need to completely drain the system, tho ugh until=0A>>- - you get used to doing it quickly, be prepared to refi ll the air=0A>>- - system), and at each annual I use that valve to drai n the entire=0A>>- - system. It is also the lowest point in the system, so that's where=0A>>- - the gunk ends up.=0A>>=0A>>- - Scott=0A>> =0A>>=0A>>- - Yak 55M wrote:=0A>>=0A>>- - - - Hi,=0A>>=0A>>- - - - I have finally secured almost everything I need to add a=0A>> - - - - compressor to my Yak55M, but I am missing one more item - a =0A>>- - - - snot valve.- It seems this little item is difficult to get.=0A>>- - - - Any lines on where I can get a snot valve would be greatly=0A>>- - - - appreciated.=0A>>=0A>>- - - - Thank s in advance,=0A>>=0A>>- - - - Anthony.=0A>>=0A>>- - - - BT W, thanks for all of the advice in finding the sheer=0A>>- - - - co upling and gauge, this list made it happen.=0A>>- - - - *=0A>>=0A>> =0A>>- - - - *=0A>>=0A>>=0A>>- - ========== =0A>>- - rget="_blank">http://www.matronics.com/Navigator?Yak-List=0A >>- - ===========0A>>- - http://forums.matronic s.com=0A>>- - ===========0A>>- - le, List Admin .=0A>>- - ="_blank">http://www.matronics.com/contribution=0A>>- - ===========0A>>=0A>>=0A>>=0A>>=0A>>=0A>>=0A>> -- =0A>> Always Yakin,=0A>> Doug Sapp=0A>> Phone 509-826-4610=0A>> Fax 509-826-3644 =0A>> *=0A>>=0A>>=0A>> *=0A>=0A>=0A=0A=0A=0A=0A=0A=0A=0A=0A=0A=0AChecked by =========================0A ======================= ________________________________ Message 12 ____________________________________ Time: 05:55:25 PM PST US From: Stephen Morrey Subject: Re: Yak-List: Re: yak 52 fuel instrument Well I did some trouble shooting and now I have confirmed I have a faulty instrument and the sending units are good. Does anyone have any suggestions on trouble shooting the instrument (right side) or perhaps someone knows where I can get a good instrument. Steve. Sent from my iPhone On May 25, 2009, at 8:29 PM, Yak Pilot wrote: > For anyone following this string.. > > I=99ve looked at Rob=99s diagrams and schematics and think that he is > absolutely on the right sheet of music on how this system works. I > thought it was all phase related (I.E. Analog in nature) and not an > y kind of binary counter, in sequence or otherwise. After looking > at Rob=99s work I have to conclude that I am totally wrong with my ass > umptions and Rob=99s theory of operation is exactly right. Nice work > Rob. Really first class. > > Mark Bitterlich > > > From: Rob Rowe > To: yak-list@matronics.com > Sent: Monday, May 25, 2009 10:30:32 AM > Subject: Yak-List: Re: yak 52 fuel instrument > > > Mark, > > I'll email you a later version of my schematic with the (2006) error > corrected. > > You may have read too much into my last post. I didn't say it was a > progressive binary sequence, just that there could be a unique logic > combination per discrete fuel level. > > To that end I've created a logic state table (PDF attached - I'll > email you a copy too) that weights the secondary coils by their > individual in/anti-phase winding ratios. > > By arbitrarily multiplying this logic weighted ratio by 50 to make > the numbers easier to interpret, the result is a close approximation > of the fuel display readings (within +/- 4% until > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=245255#245255 > > > Attachments: > > http://forums.matronics.com//files/fuel_display_logic_table_147.pdf > > ________________________________ Message 13 ____________________________________ Time: 06:50:18 PM PST US From: Yak Pilot Subject: Re: Yak-List: Re: yak 52 fuel instrument Stephen... WTF Over?=C2- =0A=0AYou said:=C2- " If this helps. I have tr ied two instruments with the same results. " =0A=0ANow you say:=C2- "Well I did some trouble shooting and now I have confirmed I have a faulty instr ument and the sending units are good."=0A=0AI'm just curious as to what has changed.=C2- =0A=0AI have not seen any of these parts yet... but accordi ng to sources, the cockpit display is merely some switching diodes, and som e lamp drivers.=C2- A good Avionics Tech might have some luck with it mer ely by ringing out some components.=C2- Easy to say... I've never done it .=C2- =0A=0AI'm not yet ready to tackle this project, but I am working to wards it.=C2- Sorry to not be able to be of more help. =0A=0AMark Bitterl ich=0A=0A=C2-=0A=0A=0A=0A________________________________=0AFrom: Stephen Morrey =0ATo: "yak-list@matronics.com" =0ASent: Monday, May 25, 2009 8:54:22 PM=0ASubject: Re: Yak-L ist: Re: yak 52 fuel instrument=0A=0A=0AWell I did some trouble shooting an d now I have confirmed I have a faulty instrument and the sending units are good. Does anyone have any suggestions on trouble shooting the instrument (right side) or perhaps someone knows where I can get a good instrument. St eve.=C2-=0A=0ASent from my iPhone=0A=0AOn May 25, 2009, at 8:29 PM, Yak P ilot wrote:=0A=0A=0AFor anyone following this string .. =0A=C2-=0AI=99ve looked at Rob=99s diagrams and sche matics and think that he is absolutely on the right sheet of music on how t his system works.=C2- I thought it was all phase related (I.E. Analog in nature) =C2-and not any kind of binary counter, in sequence or otherwise. =C2-=C2- After looking at Rob=99s work I have to conclude that I am totally wrong with my assumptions and Rob=99s theory of operation is exactly right.=C2- Nice work Rob.=C2- Really first class. =0A=C2- =0AMark Bitterlich=0A=0A=0A=0A=0A________________________________=0AFrom: R ob Rowe =0ATo: yak-list@matronics.com=0ASent: Mo nday, May 25, 2009 10:30:32 AM=0ASubject: Yak-List: Re: yak 52 fuel instrum com>=0A=0AMark,=0A=0AI'll email you a later version of my schematic with th e (2006) error corrected.=0A=0AYou may have read too much into my last post . I didn't say it was a progressive binary sequence, just that there could be a unique logic combination per discrete fuel level.=0A=0ATo that end I'v e created a logic state table (PDF attached - I'll email you a copy too) th at weights the secondary coils by their individual in/anti-phase winding ra tios. =0A=0ABy arbitrarily multiplying this logic weighted ratio by 50 to m ake the numbers easier to interpret, the result is a close approximation of the fuel display readings (within +/- 4% until =0A=0A=0A=0A=0ARead this to pic online here:=0A=0Ahttp://forums.matronics.com/viewtopic.php?p=245255# 245255=0A=0A=0A=0A=0AAttachments: =0A=0Ahttp://forums.matronics.com//files/ fuel_display_logic_table_147.pdf=0A=0A=0A=0A href="http://www.matronics. com/Navigator?Yak-List">http://www.matronics.com/Navigator?Yak-Listhref=" http://forums.matronics.com">http://forums.matronics.com href="http://ww w.matronics.com/contribution">http://www.matronics.com/contribution =0A ======= ________________________________ Message 14 ____________________________________ Time: 08:37:30 PM PST US From: Walter Lannon Subject: Re: Yak-List: Re: spark plug gapping (new questions) Doug & Mike: NO!!! That is not a gapping tool. It is simply a gauge. Do not attempt to change the gap by applying any pressure to the center electrode. This can crack the porcelain insulator. Walt ----- Original Message ----- From: "skidmk" Sent: Monday, May 25, 2009 5:01 PM Subject: Yak-List: Re: spark plug gapping (new questions) > > yep did that, what if its too loose? > > -------- > Mike "Skidmk" Bourget > Ottawa, Ontario > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=245328#245328 > > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message yak-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Yak-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/yak-list Browse Digests http://www.matronics.com/digest/yak-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.