---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Mon 04/11/16: 19 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:48 AM - Intake manifold drain system? (John B) 2. 02:29 AM - FW: Manifold oil drain (Richard Goode) 3. 03:07 AM - Re: What are folks using for a Top-Dead-Center finder? (A. Dennis Savarese) 4. 05:52 AM - Re: Carry spare air CO2...ever leave your valve on? (Ernest Martinez) 5. 06:14 AM - Re: Intake manifold drain system? (Roger Kemp) 6. 06:23 AM - Re: Carry spare air CO2...ever leave your valve on? (Roger Kemp) 7. 09:48 AM - Re: Intake tube tool? Supercharger-to-intake tube. (doug sapp) 8. 09:59 AM - Re: Carry spare air CO2...ever leave your valve on? (Lee Haven) 9. 10:07 AM - Re: Carry spare air CO2...ever leave your valve on? (Ernest Martinez) 10. 11:15 AM - Yak52 GEN FAULT light (Rui Cavaco) 11. 11:28 AM - Re: [Non-DoD Source] Yak52 GEN FAULT light (Bitterlich, Mark G CIV NAVAIR, WD) 12. 11:50 AM - TDC Tools (Craig Payne) 13. 12:05 PM - Re: TDC Tools (Ernest Martinez) 14. 12:54 PM - Re: TDC Tools (A. Dennis Savarese) 15. 02:41 PM - Baffle seals for M14-P (John B) 16. 02:59 PM - Re: Baffle seals for M14-P (George S. Coy) 17. 06:46 PM - Re: TDC Tools (Roger Kemp) 18. 07:01 PM - Re: TDC Tools (Jon Blake) 19. 08:18 PM - Re: TDC Tools (Walter Lannon) ________________________________ Message 1 _____________________________________ Time: 12:48:33 AM PST US From: John B Subject: Yak-List: Intake manifold drain system? Does anyone have pictures, or a good description, of their intake manifold drains? Series one engine preferred. Thank you! John B ________________________________ Message 2 _____________________________________ Time: 02:29:52 AM PST US From: "Richard Goode" Subject: Yak-List: FW: Manifold oil drain In response - here is a schematic drawing of the manifold oil drain system. I should say that we prefer to have two drain taps, one draining two intake tubes and the other a single one. It is also important to keep the length of hose very short - we've seen some installations which go back to the rear of the engine cowling, and, particularly in cold weather, this can lead to the oil congealing and not draining well. In addition, the standard large nut on the intake tubes is quite thin, and is certainly not designed to be drilled and tapped for an A N fitting, and are liable to crack, and for this reason we make much thicker nuts with more than sufficient metal to be drilled and tapped. Richard Goode Aerobatics Rhodds Farm Lyonshall Hereford HR5 3LW Tel: +44 (0) 1544 340120 Fax: +44 (0) 1544 340129 www.russianaeros.com ________________________________ Message 3 _____________________________________ Time: 03:07:09 AM PST US From: "A. Dennis Savarese" Subject: Re: Yak-List: What are folks using for a Top-Dead-Center finder? I think you're right Walt.BRDennis From: Walter Lannon To: yak-list@matronics.com Sent: Sunday, April 10, 2016 11:43 PM Subject: Re: Yak-List: What are folks using for a Top-Dead-Center finder? Hi Dennis;=C2-I guess the angle then is not acute enough to cause bending .=C2-=C2- But it is designed for a centrally located spark plug hole at 90 deg. from the piston surface.=C2-CheersWalt=C2-From: A. Dennis Sava rese Sent: Sunday, April 10, 2016 1:44 PMTo: yak-list@matronics.com Subject : Re: Yak-List: What are folks using for a Top-Dead-Center finder?=C2-Yes that's true Walt. But I know it works on M14's and HS6's. I would imagine the manufacturer never intended it to be used on an aircraft radial engine. =C2- What I was looking forwhen I found this several years ago was a TDC tool for 14mm threads.=C2- Also one with a "ball" on the sliding componen t because of the plug thread angle to the top of the piston.=C2- When I b ought this one I knew it might not work.=C2- I figured I could always ret urn if it didn't work.=C2- I've had it ever since. Best regards, Dennis Sent from my iPhone On Apr 10, 2016, at 1:56 PM, Walter Lannon wrote: Hi Dennis; =C2- Out of curiosity I checked the website you provided. =C2-=C2- It sure enough is a TDC indicating tool but could not work on any aircraft engine.=C2- Check the user comments. Wrong website? =C2- B est; Walt =C2- From: A. Dennis Savarese Sent: Sunday, April 10, 2016 5:11 AM To: yak-list@matronics.com Subject: Re: Yak-List: What are folks u sing for a Top-Dead-Center finder? =C2- This one works well and I have used it for several years.=C2- You may find it at other retailers.=C2- 14mm thread. =C2- http://www.amazon.com/Innovative-Products-America-7880-Indicator/dp /B002XMOMA2 =C2- Dennis From: John B Sent: Sunday, April 10, 2016 1:37 AM Subject: Yak-List: What are folks using for a Top-Dead-Center finder? =C2- The TDC tool is missing from my tool kit.=C2- Has anyone had an y luck with an automotive type?=C2-=C2- John B Phoenix ________________________________ Message 4 _____________________________________ Time: 05:52:50 AM PST US Subject: Re: Yak-List: Carry spare air CO2...ever leave your valve on? From: Ernest Martinez That is very cool. Do just use this in the hangar with an external shop air compressor, or have you tried using the residual air in the main air tank? Ernie On Sun, Apr 10, 2016 at 10:40 PM, Cory Robin wrote: > I love my little compressor... > > http://shoeboxcompressor.com/ > > We don't need the higher compressions, but this thing will fill your tank > in a couple minutes. (or a spare scuba tank without having to pay for > refills) > > Cory. > > > On Sun, Apr 10, 2016 at 7:34 PM, Ernest Martinez > wrote: > >> Firstly I'm not sure what you mean by "CO2 transitions to vapor at 750 >> PSI". Solid CO2 will sublimate directly to gas at room temp. Compressing >> gaseous CO2 will cause it to transition to a liquid. It will transition >> immediately to a gas once the pressure drops. >> >> I'm not quite sure that releasing liquid CO2 from a tank into the air >> lines would make it turn into a gas unless there was some space at the top >> of the bottle and it was standing upright. So you would be dumping liquid >> CO2 into the cylinder where it would violently expand. Even if it did >> arrive at the cylinder as an expanding gas, it would be at several hundred >> degrees below zero and I'm not sure what effect that would have on the >> piston, rings, and the cylinder itself. I would think that the rapid >> cooling would cause the cylinder to contract and seize the piston in place. >> Then theres all the water that would immediately condense in the cylinder. >> >> Lastly, only SOME planes are able to start on nitrogen, SOME can't, >> probably has to do with air distributor timing. I don't think a frozen, >> water laden cylinder would fare very well. >> >> Ernie >> >> >> >> On Sun, Apr 10, 2016 at 8:48 PM, Lee Haven >> wrote: >> >>> >>> >>> Has anyone ever used a LIQUID CO2 tank as a spare air source? They are >>> common for paintball or beer kegs, lightweight carbon fiber, carry a DOT >>> rating, and WAY more dense than carrying compressed gas in a pony bottle. >>> This means you can carry a tiny thermos bottle size tank and get a FULL >>> recharge on your main. >>> >>> CO2 transitions liquid to vapor phase at 750 psi (50 bar, perfect). >>> 1 pound of CO2 is 8.5 cubic feet of gas at STP. >>> The main tank is about 1 cubic foot (charge to 750 psi, 50 bar/cubic >>> feet are needed if dead flat). >>> For reference, a SCUBA tank is 80 cubic feet compressed (3000 psi). >>> >>> Therefore, a tiny thermos sized tank at 20 ounces would charge the main >>> to 75 percent from half dead. >>> >>> Carrying a 2.5 pound tank (about same as a MINI pony bottle) would be a >>> full main air recharge (and under 5 pounds and 4"X15"...tiny) >>> >>> I have done many 100 percent nitrogen refill starts so I know inert gas >>> starts (such as CO2) work. >>> >>> Question is...i am curious to know if anyone else has tried? I would >>> love to carry a small, lunchbox size tank to get a second chance at >>> startup...nobody ever leaves their valve open right? >>> >>> Lee Haven >>> Green bay formation FIGHT club >>> >> >> > ________________________________ Message 5 _____________________________________ Time: 06:14:35 AM PST US Subject: Re: Yak-List: Intake manifold drain system? From: Roger Kemp Can make one later today. Jim Kimble has the kits. Doc Sent from my iPad > On Apr 11, 2016, at 2:45 AM, John B wrote: > > Does anyone have pictures, or a good description, of their intake manifold drains? > Series one engine preferred. > Thank you! > John B ________________________________ Message 6 _____________________________________ Time: 06:23:43 AM PST US Subject: Re: Yak-List: Carry spare air CO2...ever leave your valve on? From: Roger Kemp It provides non-breathable air. Don't use it on your scuba tanks if you plan on diving with them. Doc Sent from my iPad > On Apr 11, 2016, at 7:52 AM, Ernest Martinez wrote: > > That is very cool. Do just use this in the hangar with an external shop ai r compressor, or have you tried using the residual air in the main air tank? > > Ernie > >> On Sun, Apr 10, 2016 at 10:40 PM, Cory Robin wrot e: >> I love my little compressor... >> >> http://shoeboxcompressor.com/ >> >> We don't need the higher compressions, but this thing will fill your tank in a couple minutes. (or a spare scuba tank without having to pay for refi lls) >> >> Cory. >> >> >> >>> On Sun, Apr 10, 2016 at 7:34 PM, Ernest Martinez wr ote: >>> Firstly I'm not sure what you mean by "CO2 transitions to vapor at 750 P SI". Solid CO2 will sublimate directly to gas at room temp. Compressing gase ous CO2 will cause it to transition to a liquid. It will transition immediat ely to a gas once the pressure drops. >>> >>> I'm not quite sure that releasing liquid CO2 from a tank into the air li nes would make it turn into a gas unless there was some space at the top of t he bottle and it was standing upright. So you would be dumping liquid CO2 in to the cylinder where it would violently expand. Even if it did arrive at th e cylinder as an expanding gas, it would be at several hundred degrees below zero and I'm not sure what effect that would have on the piston, rings, and the cylinder itself. I would think that the rapid cooling would cause the c ylinder to contract and seize the piston in place. Then theres all the water that would immediately condense in the cylinder. >>> >>> Lastly, only SOME planes are able to start on nitrogen, SOME can't, prob ably has to do with air distributor timing. I don't think a frozen, water la den cylinder would fare very well. >>> >>> Ernie >>> >>> >>> >>>> On Sun, Apr 10, 2016 at 8:48 PM, Lee Haven w rote: >>>> >>>> >>>> Has anyone ever used a LIQUID CO2 tank as a spare air source? They are common for paintball or beer kegs, lightweight carbon fiber, carry a DOT ra ting, and WAY more dense than carrying compressed gas in a pony bottle. Thi s means you can carry a tiny thermos bottle size tank and get a FULL recharg e on your main. >>>> CO2 transitions liquid to vapor phase at 750 psi (50 bar, perfect). >>>> 1 pound of CO2 is 8.5 cubic feet of gas at STP. >>>> The main tank is about 1 cubic foot (charge to 750 psi, 50 bar/cubic fe et are needed if dead flat). >>>> For reference, a SCUBA tank is 80 cubic feet compressed (3000 psi). >>>> >>>> Therefore, a tiny thermos sized tank at 20 ounces would charge the main to 75 percent from half dead. >>>> >>>> Carrying a 2.5 pound tank (about same as a MINI pony bottle) would be a full main air recharge (and under 5 pounds and 4"X15"...tiny) >>>> >>>> I have done many 100 percent nitrogen refill starts so I know inert gas starts (such as CO2) work. >>>> >>>> Question is...i am curious to know if anyone else has tried? I would l ove to carry a small, lunchbox size tank to get a second chance at startup.. .nobody ever leaves their valve open right? >>>> >>>> Lee Haven >>>> Green bay formation FIGHT club >>>> >>> >> > ________________________________ Message 7 _____________________________________ Time: 09:48:32 AM PST US Subject: Re: Yak-List: Intake tube tool? Supercharger-to-intake tube. From: doug sapp John, I have most all the tools in stock. Doug On Sat, Apr 9, 2016 at 10:36 PM, John B wrote: > Folks- > I don't remember who said they had a supercharger-to-intake tube wrench > available. If anyone has a spare, please PM me. > Thank you! > John B > Phoenix, AZ > ________________________________ Message 8 _____________________________________ Time: 09:59:57 AM PST US Subject: Re: Yak-List: Carry spare air CO2...ever leave your valve on? From: Lee Haven Ernie, as you mentioned, the bottle would be of course be upright and therefore tapped for vapor not liquid. Latent heat of vaporization would cool the bottle and contents quickly as vapor was tapped and the liquid boiled. Since it would be regaining energy from ambient air, the fill process might take 5-10 minutes (similar to boiling Freon gas into your car's AC...most put the can in a pot of warm water). Liquefied CO2 is 600 times the density of CO2 gas. A great way to carry a very small tank and volume of material to refill the bottle. No one has ever used this? Maybe it's only a big deal because I am unwilling to hand prop! ________________________________ Message 9 _____________________________________ Time: 10:07:04 AM PST US Subject: Re: Yak-List: Carry spare air CO2...ever leave your valve on? From: Ernest Martinez Try it, see what happens. Let me know. On Monday, April 11, 2016, Lee Haven wrote: > Ernie, as you mentioned, the bottle would be of course be upright and > therefore tapped for vapor not liquid. > > Latent heat of vaporization would cool the bottle and contents quickly as > vapor was tapped and the liquid boiled. Since it would be regaining energy > from ambient air, the fill process might take 5-10 minutes (similar to > boiling Freon gas into your car's AC...most put the can in a pot of warm > water). > > Liquefied CO2 is 600 times the density of CO2 gas. A great way to carry a > very small tank and volume of material to refill the bottle. No one has > ever used this? Maybe it's only a big deal because I am unwilling to hand > prop! > ________________________________ Message 10 ____________________________________ Time: 11:15:24 AM PST US Subject: Yak-List: Yak52 GEN FAULT light From: Rui Cavaco Hi! My Yak is doesnt disconnect the generator at low RPM, and the ampmeter shows left of 0 at low RPM and right of 0 indication at RPM above 40%. any ideas ? Thanks Rui Cavaco ________________________________ Message 11 ____________________________________ Time: 11:28:50 AM PST US From: "Bitterlich, Mark G CIV NAVAIR, WD" Subject: RE: [Non-DoD Source] Yak-List: Yak52 GEN FAULT light Yes, this is a classic case of your batteries being weak. Replace them. If you keep running the airplane in this condition you stand a strong chance of ruining the DMR-200 relay, if you have not already. To check to see if it is still working at all, turn on your master with the engine not running and observe that the ammeter is close to zero. If it is, you've a lucky man. The DMR-200 requires reverse current to disconnect the generator at idle (as it is supposed to do). If your batteries are too weak to provide this current, the relay stays energized and you discharge back into the generator and things start getting hot quickly. Mark -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Rui Cavaco Sent: Monday, April 11, 2016 2:15 PM Subject: [Non-DoD Source] Yak-List: Yak52 GEN FAULT light Hi! My Yak is doesnt disconnect the generator at low RPM, and the ampmeter shows left of 0 at low RPM and right of 0 indication at RPM above 40%. any ideas ? Thanks Rui Cavaco ________________________________ Message 12 ____________________________________ Time: 11:50:40 AM PST US Subject: Yak-List: TDC Tools From: Craig Payne Anyone remember the top device in the attached pic? They were sold on eBay a number of years ago for these engines. Craig Payne ________________________________ Message 13 ____________________________________ Time: 12:05:33 PM PST US Subject: Re: Yak-List: TDC Tools From: Ernest Martinez Looks like a steam punk rectal thermometer. On Mon, Apr 11, 2016 at 2:49 PM, Craig Payne wrote: > Anyone remember the top device in the attached pic? They were sold on eBay > a number of years ago for these engines. > > Craig Payne > ________________________________ Message 14 ____________________________________ Time: 12:54:57 PM PST US From: "A. Dennis Savarese" Subject: Re: Yak-List: TDC Tools I do.=C2- The bottom one in the photo is from the original Russian tool k it for the M14.=C2- Have two very bad experiences with them.=C2- Actual ly had to cut them off just above the spark plug hole because the hook on t he tool jammed inside the cylinder when attempting to remove it.=C2-=C2 -=C2- That one I do NOT recommend using under any circumstances. Dennis From: Craig Payne To: yak-list Sent: Monday, April 11, 2016 2:49 PM Subject: Yak-List: TDC Tools Anyone remember the top device in the attached pic? They were sold on eBay a number of years ago for these engines. Craig Payne ________________________________ Message 15 ____________________________________ Time: 02:41:01 PM PST US From: John B Subject: Yak-List: Baffle seals for M14-P Is anyone selling the flexible baffle material? Might a kit be available? Thank you. John B ________________________________ Message 16 ____________________________________ Time: 02:59:52 PM PST US From: "George S. Coy" Subject: RE: Yak-List: Baffle seals for M14-P We can supply new baffle cushions. These are the cushions mounted around the perimeter of the engine metal baffles. George Coy MotorstarNA 714 Airport Rd. Swanton VT 05488 802-868-5633 off 802-363-5782 cell 802-868-6632 Fax george.coy@gmail.com http://motorstarna.com/ SKYPE george.coy From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of John B Sent: Monday, April 11, 2016 5:40 PM Subject: Yak-List: Baffle seals for M14-P Is anyone selling the flexible baffle material? Might a kit be available? Thank you. John B ________________________________ Message 17 ____________________________________ Time: 06:46:26 PM PST US Subject: Re: Yak-List: TDC Tools From: Roger Kemp No Ernie the steam punk rectal thermometer is bigger. Had to take one out of a gay boy once. Doc Sent from my iPad > On Apr 11, 2016, at 2:04 PM, Ernest Martinez wrote: > > Looks like a steam punk rectal thermometer. > >> On Mon, Apr 11, 2016 at 2:49 PM, Craig Payne wrote: >> Anyone remember the top device in the attached pic? They were sold on eBa y a number of years ago for these engines. >> >> Craig Payne > ________________________________ Message 18 ____________________________________ Time: 07:01:37 PM PST US Subject: Re: Yak-List: TDC Tools From: Jon Blake RG9jLCBjZXJ0YWluIHRoaW5ncyB3ZSBuZXZlciBuZWVkIHRvIGhlYXIgYWJvdXQuLi4KClNlbnQg ZnJvbSBteSBWZXJpem9uIFdpcmVsZXNzIDRHIExURSBEUk9JRAoKUm9nZXIgS2VtcCA8ZjE2dmlw ZXJkb2NAbWUuY29tPiB3cm90ZToKCj5ObyBFcm5pZSB0aGUgc3RlYW0gcHVuayByZWN0YWwgdGhl cm1vbWV0ZXIgaXMgYmlnZ2VyLiBIYWQgdG8gdGFrZSBvbmUgb3V0IG9mIGEgZ2F5IGJveSBvbmNl Lgo+Cj5Eb2MKPgo+U2VudCBmcm9tIG15IGlQYWQKPgo+Cj5PbiBBcHIgMTEsIDIwMTYsIGF0IDI6 MDQgUE0sIEVybmVzdCBNYXJ0aW5leiA8ZXJuaWVsMjlAZ21haWwuY29tPiB3cm90ZToKPgo+TG9v a3MgbGlrZSBhIHN0ZWFtIHB1bmsgcmVjdGFsIHRoZXJtb21ldGVyLgo+Cj4KPk9uIE1vbiwgQXBy IDExLCAyMDE2IGF0IDI6NDkgUE0sIENyYWlnIFBheW5lIDx5YWttYW4yODVAZ21haWwuY29tPiB3 cm90ZToKPgo+QW55b25lIHJlbWVtYmVyIHRoZSB0b3AgZGV2aWNlIGluIHRoZSBhdHRhY2hlZCBw aWM/IFRoZXkgd2VyZSBzb2xkIG9uIGVCYXkgYSBudW1iZXIgb2YgeWVhcnMgYWdvIGZvciB0aGVz ZSBlbmdpbmVzLgo+Cj5DcmFpZyBQYXluZQo+Cj4K ________________________________ Message 19 ____________________________________ Time: 08:18:54 PM PST US From: "Walter Lannon" Subject: Re: Yak-List: TDC Tools I have never seen the top one. Looks like a very good unit. I wonder if that could be a Czech or Polish version. Will check with the local Wilga guy. The bottom one is the factory original (Russian or Chinese) both of which I have been using for about 20 years. Walt From: Craig Payne Sent: Monday, April 11, 2016 11:49 AM Subject: Yak-List: TDC Tools Anyone remember the top device in the attached pic? They were sold on eBay a number of years ago for these engines. 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