---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Tue 10/13/09: 22 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:22 AM - Re: Smoke Systems (doug sapp) 2. 06:59 AM - Re: smoke systems (Mozam) 3. 07:13 AM - Re: M-14P chip detector (Mozam) 4. 07:26 AM - Re: Re: M-14P chip detector (A. Dennis Savarese) 5. 07:42 AM - Re: M-14P chip detector (Mozam) 6. 07:55 AM - Re: Re: M-14P chip detector (Don Milbourn) 7. 08:35 AM - Re: Re: M-14P chip detector (A. Dennis Savarese) 8. 08:40 AM - Re: Re: M-14P chip detector (nc69666@aol.com) 9. 09:11 AM - Re: Smoke Systems (William Halverson) 10. 09:14 AM - Re: Re: M-14P chip detector (doug sapp) 11. 09:19 AM - Re: Re: M-14P chip detector (Don Milbourn) 12. 10:11 AM - Re: Looking for Yak flight training (Barry Hancock) 13. 01:07 PM - YAK 18T Battery (tigeryak18t) 14. 01:25 PM - Re: ultrasonic leak detectors (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E) 15. 03:02 PM - Re: YAK 18T Battery (tigeryak18t) 16. 03:42 PM - Re: Re: YAK 18T Battery (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E) 17. 05:03 PM - Re: Re: YAK 18T Battery (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E) 18. 07:29 PM - Re: Smoke Systems (Roger Kemp M.D.) 19. 09:32 PM - CJ6 Propellor (Walter Lannon) 20. 11:09 PM - Re: Re: YAK 18T Battery (Didier.blouzard) 21. 11:39 PM - Re: Re: YAK 18T Battery (nc69666@aol.com) 22. 11:52 PM - Re: Re: YAK 18T Battery (Michael Wikstrom) ________________________________ Message 1 _____________________________________ Time: 06:22:46 AM PST US Subject: Re: Yak-List: Smoke Systems From: doug sapp Reade,More gain will come from pressurizing the cockpit with fresh ram air than trying to seal the cockpit against smoke entering it. Once you equal or exceed the pressure outside when compared the the pressure inside the smoke will become a non issue. Doug On Mon, Oct 12, 2009 at 7:43 PM, Genzlinger, Reade wrote: > > Anyone have the Termikas fabricated smoke system installed? I am flying > a 52TD with their system and it works quite well. I have no > documentation, however (capacity - which I have figured pretty close, > type of pump, pressures, etc.). Any information would be greatly > appreciated. > > BTW - it is plumbed into both stacks and makes lots of smoke - a good > portion of which ends up in the cockpit. I am gap sealing everything > imaginable! > > Reade Genzlinger > Cairnwood Cooperative Corporation > mailto:readeg@cairnwood.com > 215.914.0370 > > -- Douglas Sapp Doug Sapp LLC 18B Riverview Road Omak WA 98841 PH 509-826-4610 Fax 509-826-3644 ________________________________ Message 2 _____________________________________ Time: 06:59:23 AM PST US Subject: Yak-List: Re: smoke systems From: "Mozam" Hi Reade, I was finding myself blinded by smoke in the cockpit during our airshow routine. Makes it real hard to hang on the wing during loops and rolls! Photos showed that I (sitting in the cockpit) was not able to be seen by someone outside the plane because I was completely engulfed in smoke (and CO!!). Through much experimentation, here is what worked for me to greatly reduce the smoke level in the cockpit: -Drop the lower panels where the wings and fuselage attach. Put a bright light in each cockpit and crawl under the plane. Now you can see every gap to seal. I used very light weight aluminum tape I bought at Lowes. You can skip your Pilates class that day...you'll see what I mean. :D -With any g loading above 1 g, the pilot's right side exhaust comes up over the wing (and into the cockpit). The more AOA (g loading), the more smoke over the wing. I greatly reduced my problem by removing that injector. The difference in smoke produced is undetectable in video tapes make before and after. I highly recommend a Smoking Airplane's injector. I never got a home made one to work as well, and I tried a LOT of them. Not to say good home made ones don't exist, but I never got one to work. -Do not put the one injector high up in the exhaust system. Smoke leaks out of every joint and finds its way into the cockpit. Doing all the above will significantly reduce your cockpit smoke levels. Beware however, during hammerheads, tumbles and such, you cannot help but get some smoke in the cockpit. You just cannot totally eliminate it. I hope we see your TD back East, flying with us next summer, Steve Read this topic online here: http://forums.matronics.com/viewtopic.php?p=267738#267738 ________________________________ Message 3 _____________________________________ Time: 07:13:25 AM PST US Subject: Yak-List: Re: M-14P chip detector From: "Mozam" Thanks Dennis and Rich. I already tried a quick RTV patch fix and complete cleaning/inspection, which helped some. Next step is to remove it and do a "thorough" RTV repair. Question: Why do I have a "Chip" light with the engine shut off, but it goes out after start and warm up and RPM above about 1200? It "appears" that increased oil pressure, which seems to make the light go out, is involved with this problem and not worn rubber insulation. Anybody have any experience with this? Thanks, Steve Read this topic online here: http://forums.matronics.com/viewtopic.php?p=267739#267739 ________________________________ Message 4 _____________________________________ Time: 07:26:47 AM PST US From: "A. Dennis Savarese" Subject: Re: Yak-List: Re: M-14P chip detector About all I can think of is to make certain the two sections of the chip detector screen are perfectly aligned and tight. There are some "disks" between the two sections and if they are loose, will allow the chip detector screen in the rear section to shift around. Make certain the nut on the front of the chip detector at the center of the end with the rubber insulation is tight. A loose nut here will cause the looseness in the two sections. This can cause an erroneous and intermittent chip light to come on. Carefully inspect the wiring from the chip detector screen back to through the baffling and firewall. Any intermittent ground on this wire will cause the chip light to come on. Lastly, try replacing the chip detector screen assembly and see if the problem disappears. Let us know what you find. Dennis ----- Original Message ----- From: Mozam To: yak-list@matronics.com Sent: Tuesday, October 13, 2009 9:13 AM Subject: Yak-List: Re: M-14P chip detector Thanks Dennis and Rich. I already tried a quick RTV patch fix and complete cleaning/inspection, which helped some. Next step is to remove it and do a "thorough" RTV repair. Question: Why do I have a "Chip" light with the engine shut off, but it goes out after start and warm up and RPM above about 1200? It "appears" that increased oil pressure, which seems to make the light go out, is involved with this problem and not worn rubber insulation. Anybody have any experience with this? Thanks, Steve Read this topic online here: http://forums.matronics.com/viewtopic.php?p=267739#267739 ________________________________ Message 5 _____________________________________ Time: 07:42:11 AM PST US Subject: Yak-List: Re: M-14P chip detector From: "Mozam" Thanks Dennis, I'll keep ya posted. BTW, if I need to replace this chip detector who has one? Doug? Jill? Cheers, Steve Read this topic online here: http://forums.matronics.com/viewtopic.php?p=267742#267742 ________________________________ Message 6 _____________________________________ Time: 07:55:02 AM PST US From: "Don Milbourn" Subject: Re: Yak-List: Re: M-14P chip detector Hi Steve If you wan't a good sealant to use you might try Permatex Right Stuff Item # 29208 this is the best rtv gsaket stuff . Care must be taken when removing the part after using this stuff it will seal anything, well almost anything. ----- Original Message ----- From: "Mozam" Sent: Tuesday, October 13, 2009 8:13 AM Subject: Yak-List: Re: M-14P chip detector > > Thanks Dennis and Rich. I already tried a quick RTV patch fix and complete cleaning/inspection, which helped some. Next step is to remove it and do a "thorough" RTV repair. > > Question: Why do I have a "Chip" light with the engine shut off, but it goes out after start and warm up and RPM above about 1200? It "appears" that increased oil pressure, which seems to make the light go out, is involved with this problem and not worn rubber insulation. Anybody have any experience with this? > > Thanks, > Steve > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=267739#267739 > > ________________________________ Message 7 _____________________________________ Time: 08:35:25 AM PST US From: "A. Dennis Savarese" Subject: Re: Yak-List: Re: M-14P chip detector Don, Does this sealant cure to solid like other RTV or does it remain soft and sticky? Dennis ----- Original Message ----- From: Don Milbourn To: yak-list@matronics.com Sent: Tuesday, October 13, 2009 9:54 AM Subject: Re: Yak-List: Re: M-14P chip detector Hi Steve If you wan't a good sealant to use you might try Permatex Right Stuff Item # 29208 this is the best rtv gsaket stuff . Care must be taken when removing the part after using this stuff it will seal anything, well almost anything. ----- Original Message ----- From: "Mozam" To: Sent: Tuesday, October 13, 2009 8:13 AM Subject: Yak-List: Re: M-14P chip detector > > Thanks Dennis and Rich. I already tried a quick RTV patch fix and complete cleaning/inspection, which helped some. Next step is to remove it and do a "thorough" RTV repair. > > Question: Why do I have a "Chip" light with the engine shut off, but it goes out after start and warm up and RPM above about 1200? It "appears" that increased oil pressure, which seems to make the light go out, is involved with this problem and not worn rubber insulation. Anybody have any experience with this? > > Thanks, > Steve > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=267739#267739 > > > > > > > > > > ________________________________ Message 8 _____________________________________ Time: 08:40:16 AM PST US Subject: Re: Yak-List: Re: M-14P chip detector From: nc69666@aol.com Steve,? Gary here in Las Vegas,, I have had a similar situation on my CJ with a?Capacitance Fuel sending unit, it would indicate empty until I was at about 1200 RPM when the Alternator would come on line and then?it would work ok , since then it has fixed itself, so Dennis's suggestion about a ground connection, or possibly B+ connection may have some resistance, may be a good thought...?Just a thought..? Good Luck... Gary ? -----Original Message----- From: Mozam Sent: Tue, Oct 13, 2009 7:13 am Subject: Yak-List: Re: M-14P chip detector Thanks Dennis and Rich. I already tried a quick RTV patch fix and complete cleaning/inspection, which helped some. Next step is to remove it and do a "thorough" RTV repair. Question: Why do I have a "Chip" light with the engine shut off, but it goes out after start and warm up and RPM above about 1200? It "appears" that increased oil pressure, which seems to make the light go out, is involved with this problem and not worn rubber insulation. Anybody have any experience with this? Thanks, Steve Read this topic online here: http://forums.matronics.com/viewtopic.php?p=267739#267739 ________________________________ Message 9 _____________________________________ Time: 09:11:49 AM PST US From: "William Halverson" Subject: Re: Yak-List: Smoke Systems Good point - sealing exhaust gaps did not work in my 55 either ... +-----Original Message----- +From: doug sapp [mailto:dougsappllc@gmail.com] +Sent: Tuesday, October 13, 2009 06:15 AM +To: yak-list@matronics.com +Subject: Re: Yak-List: Smoke Systems + +Reade,More gain will come from pressurizing the cockpit with fresh ram air +than trying to seal the cockpit against smoke entering it. Once you equal +or exceed the pressure outside when compared the the pressure inside the +smoke will become a non issue. + +Doug + +On Mon, Oct 12, 2009 at 7:43 PM, Genzlinger, Reade wrote: + +> +> Anyone have the Termikas fabricated smoke system installed? I am flying +> a 52TD with their system and it works quite well. I have no +> documentation, however (capacity - which I have figured pretty close, +> type of pump, pressures, etc.). Any information would be greatly +> appreciated. +> +> BTW - it is plumbed into both stacks and makes lots of smoke - a good +> portion of which ends up in the cockpit. I am gap sealing everything +> imaginable! +> +> Reade Genzlinger +> Cairnwood Cooperative Corporation +> mailto:readeg@cairnwood.com +> 215.914.0370 +> +> +> +> +> +> + + +-- +Douglas Sapp +Doug Sapp LLC +18B Riverview Road +Omak WA 98841 +PH 509-826-4610 +Fax 509-826-3644 + ________________________________ Message 10 ____________________________________ Time: 09:14:12 AM PST US Subject: Re: Yak-List: Re: M-14P chip detector From: doug sapp Steve,No chip detectors in stock. doug On Tue, Oct 13, 2009 at 7:41 AM, Mozam wrote: > > Thanks Dennis, I'll keep ya posted. > > BTW, if I need to replace this chip detector who has one? Doug? Jill? > > Cheers, > Steve > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=267742#267742 > > -- Douglas Sapp Doug Sapp LLC 18B Riverview Road Omak WA 98841 PH 509-826-4610 Fax 509-826-3644 ________________________________ Message 11 ____________________________________ Time: 09:19:50 AM PST US From: "Don Milbourn" Subject: Re: Yak-List: Re: M-14P chip detector Dennis, It cures solid it sticks to any thing. ----- Original Message ----- From: A. Dennis Savarese To: yak-list@matronics.com Sent: Tuesday, October 13, 2009 9:33 AM Subject: Re: Yak-List: Re: M-14P chip detector Don, Does this sealant cure to solid like other RTV or does it remain soft and sticky? Dennis ----- Original Message ----- From: Don Milbourn To: yak-list@matronics.com Sent: Tuesday, October 13, 2009 9:54 AM Subject: Re: Yak-List: Re: M-14P chip detector Hi Steve If you wan't a good sealant to use you might try Permatex Right Stuff Item # 29208 this is the best rtv gsaket stuff . Care must be taken when removing the part after using this stuff it will seal anything, well almost anything. ----- Original Message ----- From: "Mozam" To: Sent: Tuesday, October 13, 2009 8:13 AM Subject: Yak-List: Re: M-14P chip detector > > Thanks Dennis and Rich. I already tried a quick RTV patch fix and complete cleaning/inspection, which helped some. Next step is to remove it and do a "thorough" RTV repair. > > Question: Why do I have a "Chip" light with the engine shut off, but it goes out after start and warm up and RPM above about 1200? It "appears" that increased oil pressure, which seems to make the light go out, is involved with this problem and not worn rubber insulation. Anybody have any experience with this? > > Thanks, > Steve > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=267739#267739 > > > > > > > > > > http://www.matronics================== ======<; via the Web href="http://forums.matronics.com">http://forums.matronics.com _p; generous bsp; href="http://www.matronics.com/contribution">http://www.matronics.com/c ================ ________________________________ Message 12 ____________________________________ Time: 10:11:52 AM PST US From: Barry Hancock Subject: Yak-List: Re: Looking for Yak flight training Thanks, Doc! We don't have any -52's for training. Roger Baker is a great guy, knows the Yak very well (though he won't do inverted flat spins anymore...imagine that), his email is f4ffm2@adelphia.net He's located in San Diego. For NoCal, I'd give Kregg Victory (occasional poster here and prime time mechanic) a call as he's pretty well connected up there. Barry On Oct 13, 2009, at 12:59 AM, Yak-List Digest Server wrote: > Bdogg, > > This should be up your alley. > > doc > > > From: owner-yak-list-server@matronics.com > [mailto:owner-yak-list-server@matronics.com] On Behalf Of A. Dennis > Savarese > Sent: Monday, October 12, 2009 7:22 AM > Subject: Yak-List: Looking for Yak flight training > > > I received the email below. If anyone can help this gentleman, > please reply > directly to him. His email is captlarryv@aol.com > > Dennis ________________________________ Message 13 ____________________________________ Time: 01:07:51 PM PST US Subject: Yak-List: YAK 18T Battery From: "tigeryak18t" G'day to all, can anyone tell me what are the characteristics of the original russian battery. Mine has been exhausted yesterday because I've forgot to turn off the cockpit light and now I have to charge the battery but I don't know what s the capacity and type. Sorry if this subject has already been discussed. Thanks and kind regards Didier HA-JAC in Paris France -------- Didier Tiger YAK18T Member of Commemorative Air Force French Wing Read this topic online here: http://forums.matronics.com/viewtopic.php?p=267792#267792 ________________________________ Message 14 ____________________________________ Time: 01:25:12 PM PST US Subject: RE: Yak-List: ultrasonic leak detectors From: "Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E" I have used this type of tester extensively. That said, I'll throw this out for what it is worth. These types of leak detectors were designed for leaks where air is going OUT and not leaks where air is going IN. I know this will probably open up a real can of worms, but my experience has been that the sound is actually made by a high pressure source going to a low(er) pressure and the noise itself is on the downside of that event. Meaning that the ultrasonics made by air going IN to a vacuum will be better heard INSIDE where the vacuum actually IS. Hard to listen for there! On the other hand, pressure leaking OUT has the sound OUTSIDE where the ultrasonic mike USUALLY is easy to use. I am not saying that the Ultrasonic leak detector will not pick up these sounds. Only that they will be much weaker than normal and very hard to hear. If the vacuum leak is happening with a gasoline motor, a much easier method is to use some sort of pressurized flammable gas in a can.... Such as starting fluid. I am not recommending starting fluid... I am merely saying some people use it. Others use WD-40! No ... really! All manner of different gases are used. ANYWAY.. You spray them around where the engine is running where there might be a vacuum leak and listen closely to what the engine then sounds like. It works. Good luck. Mark Bitterlich -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Roger Kemp M.D. Sent: Monday, October 12, 2009 19:40 Subject: RE: Yak-List: ultrasonic leak detectors --> Check with Dennis Savarese. He uses one on occasion. Doc Kemp -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Rich Langer Sent: Monday, October 12, 2009 3:45 PM Subject: Yak-List: ultrasonic leak detectors Does anyone on the list use an ultrasonic leak detector for finding vacuum leaks and, if so, do you recommend a certain brand or model? I have a small leak I can not find . Thanks Rich ________________________________ Message 15 ____________________________________ Time: 03:02:57 PM PST US Subject: Yak-List: Re: YAK 18T Battery From: "tigeryak18t" By the way, shall we fill the small cells (two blocks of ten cells) with non mineral water like in the old time??? Or acid???? Thanks Didier -------- Didier Tiger YAK18T Member of Commemorative Air Force French Wing Read this topic online here: http://forums.matronics.com/viewtopic.php?p=267811#267811 ________________________________ Message 16 ____________________________________ Time: 03:42:38 PM PST US Subject: RE: Yak-List: Re: YAK 18T Battery From: "Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E" This is not the answer you are looking for. Possibly Dennis, or Doug knows. Servicing instructions are surely in the maint. card deck. Sadly they are no where close to me at the moment. I am not even sure they are lead-acid batteries. Something floating around in memory says they might even be nickel-cadmium types! Anyway: What I am going to offer Didier is that most people .... No. ALL people that I know have taken those batteries OUT, and have replaced them with GELL CELL types. I have even done that on my UTVA-66. The aircraft charging voltage is not quite perfect I will admit, but they last a long long time and work extremely well. They also don't require any servicing. Typically two 12 VDC batteries are used in series with some kind of custom made case adapter to get them to fit right in existing spaces. B&C sells them for the YAK and Sukhoi 50, SU-26,29,31 types... But those are extremely small and light weight, (and very low capacity)...... Designed for aerobatics I might add where every extra pound is avoided! I use two very LARGE ones on the UTVA-66 (electric starter). You can pretty much design any capacity you want to have, limited only by "space" in the aircraft. Lastly, take a real hard look at this: http://www.batteryminders.com/batterycharger/catalog/BatteryMINDer-Aviat ion-Specific-Gill-LT-Series-24-Volt-4A--p-16169.html Made by BatteryMinder, and I have nothing to do with these people and rarely recommend any product. That said, this thing is the cat's ass. It works. It works well. And at New Bern, there are over 25 of them running all the time, they're EVERYWHERE, and every single owner loves them to death. Mark Bitterlich -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of tigeryak18t Sent: Tuesday, October 13, 2009 15:02 Subject: Yak-List: Re: YAK 18T Battery --> By the way, shall we fill the small cells (two blocks of ten cells) with non mineral water like in the old time??? Or acid???? Thanks Didier -------- Didier Tiger YAK18T Member of Commemorative Air Force French Wing Read this topic online here: http://forums.matronics.com/viewtopic.php?p=267811#267811 ________________________________ Message 17 ____________________________________ Time: 05:03:22 PM PST US Subject: RE: Yak-List: Re: YAK 18T Battery From: "Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E" Didier, The more I think about it, the more I am starting to think that what you might indeed have here is a multi-cell ni-cad battery. What makes me think that is the comment about the "two blocks of 10 cells". That would mean that you have a 24 volt battery with 20 cells. Divide 24 by 20 and you get 1.2 That is the EXACT typical voltage for a single NI-CAD cell. Nickel-cadmium batteries have a cadmium anode, nickel oxyhydroxide cathode, and an electrolyte of an aqueous solution of potassium hydroxide. They run slightly less voltage per cell than do lead-acid type batteries. Please be certain of what you are dealing with, and what exact kind of battery you have before servicing or charging it. Certain very violent and dangerous reactions can occur if any battery is serviced with the wrong fluids, or charged in the wrong fashion, and this is most certainly true with ni-cads. With a NI-CAD, you MUST have certain current limitations when charging, or it can go into a thermal run-a-way and blow up. As in KA-BOOM. Also once they start a thermal run-a-way, you simply can not stop them by removing charging current. It's a really bad thing. A really REALLY bad thing. So until some one who really knows answers this question, and I simply do not know for sure myself... Please be careful OK? Best Regards, Mark -----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: Tuesday, October 13, 2009 15:25 Subject: RE: Yak-List: Re: YAK 18T Battery --> Point, MALS-14 64E" This is not the answer you are looking for. Possibly Dennis, or Doug knows. Servicing instructions are surely in the maint. card deck. Sadly they are no where close to me at the moment. I am not even sure they are lead-acid batteries. Something floating around in memory says they might even be nickel-cadmium types! Anyway: What I am going to offer Didier is that most people .... No. ALL people that I know have taken those batteries OUT, and have replaced them with GELL CELL types. I have even done that on my UTVA-66. The aircraft charging voltage is not quite perfect I will admit, but they last a long long time and work extremely well. They also don't require any servicing. Typically two 12 VDC batteries are used in series with some kind of custom made case adapter to get them to fit right in existing spaces. B&C sells them for the YAK and Sukhoi 50, SU-26,29,31 types... But those are extremely small and light weight, (and very low capacity)...... Designed for aerobatics I might add where every extra pound is avoided! I use two very LARGE ones on the UTVA-66 (electric starter). You can pretty much design any capacity you want to have, limited only by "space" in the aircraft. Lastly, take a real hard look at this: http://www.batteryminders.com/batterycharger/catalog/BatteryMINDer-Aviat ion-Specific-Gill-LT-Series-24-Volt-4A--p-16169.html Made by BatteryMinder, and I have nothing to do with these people and rarely recommend any product. That said, this thing is the cat's ass. It works. It works well. And at New Bern, there are over 25 of them running all the time, they're EVERYWHERE, and every single owner loves them to death. Mark Bitterlich -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of tigeryak18t Sent: Tuesday, October 13, 2009 15:02 Subject: Yak-List: Re: YAK 18T Battery --> By the way, shall we fill the small cells (two blocks of ten cells) with non mineral water like in the old time??? Or acid???? Thanks Didier -------- Didier Tiger YAK18T Member of Commemorative Air Force French Wing Read this topic online here: http://forums.matronics.com/viewtopic.php?p=267811#267811 ________________________________ Message 18 ____________________________________ Time: 07:29:35 PM PST US From: "Roger Kemp M.D." Subject: RE: Yak-List: Smoke Systems Having done a number of CO studies on the 52 and the 50, Doug is correct. Just sealing the exhaust gaps will not stop CO getting into the cockpit. The 52 however does have a positive pressure airflow via the trumpet receiving fresh air from the nose of the aircraft. That is not enough to stop CO from getting into the cockpit. Although the 52 does on average have less CO in the cockpit than the 50. I have a different theory on why that is. It has to do with the open hole that the tail wheel strut extends out of in the tail. With airflow over the canopy, the pressure in the cockpit is decreased. That creates a decrease in pressure in the aft fuselage sucking CO into the aircraft. The CO also leaches into the cockpit through leaks in fairings along with holes in the gear wells of the 50. This all driven by the lower pressure inside the cockpit. The CO is highest during engine start, run-up, high alpha maneuvers in-flight, on landing, and during run-up to scavenge the sump. On average I see levels as high as 50 ppm for the 52 and as high as 110 ppm in the 52. After a while, I gave up on trying to block all of the CO out of the aircraft and opted for a fresh air source that was 100% free of CO. That was accomplished with using a scuba system and by using my MBU-12 aviators mask. I only use the system for taxi, take off, landing and run-up for shut down. Basically, I feel better after 2 or 3 sorties than I did before I went to this system. I have not tested the CJ with or without the NACA duct installed to vent air into the cockpit. Doc -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of William Halverson Sent: Tuesday, October 13, 2009 11:05 AM Subject: Re: Yak-List: Smoke Systems Good point - sealing exhaust gaps did not work in my 55 either ... +-----Original Message----- +From: doug sapp [mailto:dougsappllc@gmail.com] +Sent: Tuesday, October 13, 2009 06:15 AM +To: yak-list@matronics.com +Subject: Re: Yak-List: Smoke Systems + +Reade,More gain will come from pressurizing the cockpit with fresh ram air +than trying to seal the cockpit against smoke entering it. Once you equal +or exceed the pressure outside when compared the the pressure inside the +smoke will become a non issue. + +Doug + +On Mon, Oct 12, 2009 at 7:43 PM, Genzlinger, Reade wrote: + +> +> Anyone have the Termikas fabricated smoke system installed? I am flying +> a 52TD with their system and it works quite well. I have no +> documentation, however (capacity - which I have figured pretty close, +> type of pump, pressures, etc.). Any information would be greatly +> appreciated. +> +> BTW - it is plumbed into both stacks and makes lots of smoke - a good +> portion of which ends up in the cockpit. I am gap sealing everything +> imaginable! +> +> Reade Genzlinger +> Cairnwood Cooperative Corporation +> mailto:readeg@cairnwood.com +> 215.914.0370 +> +> +> +> +> +> + + +-- +Douglas Sapp +Doug Sapp LLC +18B Riverview Road +Omak WA 98841 +PH 509-826-4610 +Fax 509-826-3644 + ________________________________ Message 19 ____________________________________ Time: 09:32:38 PM PST US From: Walter Lannon Subject: Yak-List: CJ6 Propellor Anyone interested in a J9G1 CJ6 propeller. 18.7 hrs S/O by certified shop. Please contact off list wlannon@persona.ca. Walt ________________________________ Message 20 ____________________________________ Time: 11:09:23 PM PST US From: "Didier.blouzard" Subject: Re: Yak-List: Re: YAK 18T Battery Hum hum The good thing is that nothing wrong happened up to today. I did a charge of the battery on 24v and about 3 to7 amps for about 3 hours ans listening to the bubbles I removed it. Thanks to your warnings Mark I agree with you Mark about the NiCad voltage. Now I will wait to know more if anyone knows about it. Richard or Dennis if you have any info even just the type it's fine. Thanks a lot Mark, you saved my baterry (I hope) and perhaps more. Kind regards Didier Blouzard 06 24 24 36 72 Le 14 oct. 2009 01:53, "Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E" a crit : > ________________________________ Message 21 ____________________________________ Time: 11:39:21 PM PST US Subject: Re: Yak-List: Re: YAK 18T Battery From: nc69666@aol.com Didier,=C2- If you are on an airport or near one where there are corpera te Jets or Turbo Prop Acft. contact their maintenance people, those airpla nes all use Nicad batteries. Their mainrenance people will have the expert ise and equipment to maintain Nicad batteries. They will probably be able to identify type of battery=C2-you have.=C2- Gary=C2- in Las Vegas -----Original Message----- From: Didier.blouzard Sent: Tue, Oct 13, 2009 11:08 pm Subject: Re: Yak-List: Re: YAK 18T Battery om>=C2- =C2- Hum hum=C2- The good thing is that nothing wrong happened up to today. I did a charge of the battery on 24v and about 3 to7 amps for about 3 hours ans listenin g to the bubbles I removed it.=C2- =C2- Thanks to your warnings Mark=C2- =C2- I agree with you Mark about the NiCad voltage. Now I will wait to know mor e if anyone knows about it.=C2- =C2- Richard or Dennis if you have any info even just the type it's fine.=C2- =C2- Thanks a lot Mark, you saved my baterry (I hope) and perhaps more.=C2- =C2- Kind regards=C2- =C2- Didier Blouzard=C2- 06 24 24 36 72=C2- =C2- Le 14 oct. 2009 =C3- 01:53, "Bitterlich, Mark G CIV Det Cherry Point, MA LS-14 64E" a =C3=A9crit :=C2- =C2- >=C2- =C2- ======================== ====3 D=========C2- ======================== =============C2- ======================== =============C2- ======================== =============C2- =C2- ________________________________ Message 22 ____________________________________ Time: 11:52:14 PM PST US From: "Michael Wikstrom" Subject: RE: Yak-List: Re: YAK 18T Battery Didier, This is what I have in my 18T, 2 x YUASA NP17-12, sealed Lead-Acid battery, 12V 17Ah Dim 75x181x167 mm Price is 68 each (Radispares order code: 200-6505) The charger I use is, 1 x Mascot 9740, 24V/5A charger Price is 198 (Radiospares order code: 366-3856) Phone number to Radiospares in France is:0825 034 034 Cheers Michael -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Didier.blouzard Sent: 14 October 2009 08:09 Subject: Re: Yak-List: Re: YAK 18T Battery Hum hum The good thing is that nothing wrong happened up to today. I did a charge of the battery on 24v and about 3 to7 amps for about 3 hours ans listening to the bubbles I removed it. Thanks to your warnings Mark I agree with you Mark about the NiCad voltage. Now I will wait to know more if anyone knows about it. Richard or Dennis if you have any info even just the type it's fine. Thanks a lot Mark, you saved my baterry (I hope) and perhaps more. Kind regards Didier Blouzard 06 24 24 36 72 Le 14 oct. 2009 01:53, "Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E" a crit : > ------------------------------------------------------------------------------------- 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.