---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Fri 07/04/14: 9 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:49 AM - Re: Inverters (Harv) 2. 06:00 AM - oil levels (Richard Goode) 3. 06:18 AM - Re: oil levels (Olivier Vigneron) 4. 06:47 AM - Re: oil levels (Hans Oortman) 5. 08:26 AM - Brake Cable (Ernest Martinez) 6. 09:25 AM - Re: oil levels (Richard Goode) 7. 09:38 AM - Yak18T or Yak52 gear strut lens (Didier Blouzard) 8. 09:42 AM - Re: oil levels (George S. Coy) 9. 10:59 AM - (l29delfin) ________________________________ Message 1 _____________________________________ Time: 12:49:17 AM PST US Subject: Yak-List: Re: Inverters From: "Harv" Good thread! Walt Have you managed to swap the original cj6's inverter internals for a lightweight modern alternative and keep them in the same housings? What weight saving are we looking at here per unit? Rgs Harv Read this topic online here: http://forums.matronics.com/viewtopic.php?p=426059#426059 ________________________________ Message 2 _____________________________________ Time: 06:00:13 AM PST US From: "Richard Goode" Subject: Yak-List: oil levels We have just had an interesting problem which I believe deserves a wider audience. It concerns a European Sukhoi, but since the oil system is basically the same as on 50/52/54/55 Yaks, it is totally relevant. For Sukhois, the recommended oil level for aerobatics is 10 L, but our customer found that when filled to 10 L, he would always lose at least 2 L during an aerobatic session, bringing the level down to what he thought could be a worrying level. By chance, however, when filling his oil tank after changing the oil, he found that he had put in just over 12 L when the dipstick registered 10 L. We then checked his dipstick with two other Sukhoi 29s, only to find that it had a different scale, and consistently registered 2 litres less than was in the tank, so the owner was always overfilling the tank! I wonder how many other owners have ever checked how accurate their dipsticks might be! 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: 06:18:06 AM PST US Subject: Re: Yak-List: oil levels From: Olivier Vigneron you're right Richard! I noticed that if I put more than 8,5 liters oil before aerobatics, Oil will spit everytimes out... could you tell us the lengh of the different dipsticks? From the top to the 10liters mark? Thanks Olivier 2014-07-04 14:58 GMT+02:00 Richard Goode : > We have just had an interesting problem which I believe deserves a wider > audience. It concerns a European Sukhoi, but since the oil system is > basically the same as on 50/52/54/55 Yaks, it is totally relevant. > > > For Sukhois, the recommended oil level for aerobatics is 10 L, but our > customer found that when filled to 10 L, he would always lose at least 2 L > during an aerobatic session, bringing the level down to what he thought > could be a worrying level. By chance, however, when filling his oil tank > after changing the oil, he found that he had put in just over 12 L when the > dipstick registered 10 L. > > > We then checked his dipstick with two other Sukhoi 29s, only to find that > it had a different scale, and consistently registered 2 litres less than > was in the tank, so the owner was always overfilling the tank! > > > I wonder how many other owners have ever checked how accurate their > dipsticks might be! > > > Richard Goode Aerobatics > > Rhodds Farm > > Lyonshall > > Hereford > > HR5 3LW > > > Tel: +44 (0) 1544 340120 > > Fax: +44 (0) 1544 340129 > > www.russianaeros.com > > > * > > > * > > ________________________________ Message 4 _____________________________________ Time: 06:47:51 AM PST US Subject: Re: Yak-List: oil levels From: Hans Oortman Richard, Never checked it accurately but will do so soon. What I have found though in the last 10 years is the following: I always fill up the oil tank of my Yak52 between 8 and 9 litres before an aerobatic sortie. When checking the level when back on the ground I have always lost about 1 tot 1,5 litres of oil. I remember from my conversion training in Lithuania that the advise was for an aerobatic sortie not to fill up the oil tank beyond 8 litres. The statement was: =B3She will throw ou t everything above 8 litres any way......=B2 I=B9ll try to check the dip stick on how accurate it is... Hans Oortman PH-YAK Op 04-07-14 14:58, Richard Goode schreef: > We have just had an interesting problem which I believe deserves a wider > audience. It concerns a European Sukhoi, but since the oil system is basi cally > the same as on 50/52/54/55 Yaks, it is totally relevant. > > For Sukhois, the recommended oil level for aerobatics is 10 L, but our > customer found that when filled to 10 L, he would always lose at least 2 L > during an aerobatic session, bringing the level down to what he thought c ould > be a worrying level. By chance, however, when filling his oil tank after > changing the oil, he found that he had put in just over 12 L when the dip stick > registered 10 L. > > We then checked his dipstick with two other Sukhoi 29s, only to find that it > had a different scale, and consistently registered 2 litres less than was in > the tank, so the owner was always overfilling the tank! > > I wonder how many other owners have ever checked how accurate their dipst icks > might be! > > Richard Goode Aerobatics > Rhodds Farm > Lyonshall > Hereford > HR5 3LW > > Tel: +44 (0) 1544 340120 > Fax: +44 (0) 1544 340129 > www.russianaeros.com > > > > > ________________________________ Message 5 _____________________________________ Time: 08:26:04 AM PST US Subject: Yak-List: Brake Cable From: Ernest Martinez I performed my first flight in the new CJ today, and all is well :) A few things I need to address though. The brake is quite stiff, and it feels like the cable is binding. Whats the length I need to purchase. Any particular brand I should buy, or avoid? I've never replaced one, what kind of job is it? Thanks -- Ernie Nanchang CJ-6A N6315T ________________________________ Message 6 _____________________________________ Time: 09:25:14 AM PST US From: "Richard Goode" Subject: RE: Yak-List: oil levels Hello Hans, A 52 really should not throw oil out below 7 L, and ideally not below 8 L. However, the oil system is very good and will tend to pick up oil in most any attitude, even if it is somewhat low. But it was interesting to find a dipstick reading a little more than 2 L out! Regards Richard Richard Goode Aerobatics Rhodds Farm Lyonshall Hereford HR5 3LW Tel: +44 (0) 1544 340120 Fax: +44 (0) 1544 340129 www.russianaeros.com From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Hans Oortman Sent: 04 July 2014 14:47 Subject: Re: Yak-List: oil levels Richard, Never checked it accurately but will do so soon. What I have found though in the last 10 years is the following: I always fill up the oil tank of my Yak52 between 8 and 9 litres before an aerobatic sortie. When checking the level when back on the ground I have always lost about 1 tot 1,5 litres of oil. I remember from my conversion training in Lithuania that the advise was for an aerobatic sortie not to fill up the oil tank beyond 8 litres. The statement was: "She will throw out everything above 8 litres any way......" I'll try to check the dip stick on how accurate it is... Hans Oortman PH-YAK Op 04-07-14 14:58, Richard Goode schreef: We have just had an interesting problem which I believe deserves a wider audience. It concerns a European Sukhoi, but since the oil system is basically the same as on 50/52/54/55 Yaks, it is totally relevant. For Sukhois, the recommended oil level for aerobatics is 10 L, but our customer found that when filled to 10 L, he would always lose at least 2 L during an aerobatic session, bringing the level down to what he thought could be a worrying level. By chance, however, when filling his oil tank after changing the oil, he found that he had put in just over 12 L when the dipstick registered 10 L. We then checked his dipstick with two other Sukhoi 29s, only to find that it had a different scale, and consistently registered 2 litres less than was in the tank, so the owner was always overfilling the tank! I wonder how many other owners have ever checked how accurate their dipsticks might be! Richard Goode Aerobatics Rhodds Farm Lyonshall Hereford HR5 3LW Tel: +44 (0) 1544 340120 Fax: +44 (0) 1544 340129 www.russianaeros.com ail Forum - ">http://www.matronics.com/Navigator?Yak-List ; - MATRONICS WEB FORUMS - matronics.com ;- List Contribution Web Site - ; -Matt Dralle, List Admin. ://www.matronics.com/contribution -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ________________________________ Message 7 _____________________________________ Time: 09:38:24 AM PST US From: Didier Blouzard Subject: Yak-List: Yak18T or Yak52 gear strut lens Good day from Paris I have a Yak18T F-HYAK and unfortunately I broke the lens of the gear strut light. So now I am looking for a lens for the gear strut light lens and it seems that WLAC doesn't have any. Anyone know where I can find one. I am also looking for LED replacement for the gear strut light bulb Many thanks -- ____________________________ Didier BLOUZARD Directeur G=C3=A9n=C3=A9ral DATEXIS Portable : +33 6 51 84 48 02 Email: didier.blouzard@gmail.com ________________________________ Message 8 _____________________________________ Time: 09:42:50 AM PST US From: "George S. Coy" Subject: RE: Yak-List: oil levels We have seen some owners fill the tanks to 12 liters (or More) and not realize that at that oil level, it can obscure the vent on the opposite side of the oil pick up in the tank. This crates pressure in the engine and it will use prodigious quantities of oil. They then usually think there is a problem and refill it to 12 liters and repeat the process. I personally never filled them above the 8 liter mark, even on a cross country flight of 4 house duration (Yak52W or TW). I have seen this tendency in Lycoming's and Continentals. Because the oil dip stick has a 6 or 8 quart mark on it, many pilots feel it is necessary to fill it. I have had to put placards on my rental C150's not to fill above 4 quarts. George Coy From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode Sent: Friday, July 04, 2014 12:24 PM Subject: RE: Yak-List: oil levels Hello Hans, A 52 really should not throw oil out below 7 L, and ideally not below 8 L. However, the oil system is very good and will tend to pick up oil in most any attitude, even if it is somewhat low. But it was interesting to find a dipstick reading a little more than 2 L out! Regards Richard Richard Goode Aerobatics Rhodds Farm Lyonshall Hereford HR5 3LW Tel: +44 (0) 1544 340120 Fax: +44 (0) 1544 340129 www.russianaeros.com From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Hans Oortman Sent: 04 July 2014 14:47 Subject: Re: Yak-List: oil levels Richard, Never checked it accurately but will do so soon. What I have found though in the last 10 years is the following: I always fill up the oil tank of my Yak52 between 8 and 9 litres before an aerobatic sortie. When checking the level when back on the ground I have always lost about 1 tot 1,5 litres of oil. I remember from my conversion training in Lithuania that the advise was for an aerobatic sortie not to fill up the oil tank beyond 8 litres. The statement was: "She will throw out everything above 8 litres any way......" I'll try to check the dip stick on how accurate it is... Hans Oortman PH-YAK Op 04-07-14 14:58, Richard Goode schreef: We have just had an interesting problem which I believe deserves a wider audience. It concerns a European Sukhoi, but since the oil system is basically the same as on 50/52/54/55 Yaks, it is totally relevant. For Sukhois, the recommended oil level for aerobatics is 10 L, but our customer found that when filled to 10 L, he would always lose at least 2 L during an aerobatic session, bringing the level down to what he thought could be a worrying level. By chance, however, when filling his oil tank after changing the oil, he found that he had put in just over 12 L when the dipstick registered 10 L. We then checked his dipstick with two other Sukhoi 29s, only to find that it had a different scale, and consistently registered 2 litres less than was in the tank, so the owner was always overfilling the tank! I wonder how many other owners have ever checked how accurate their dipsticks might be! Richard Goode Aerobatics Rhodds Farm Lyonshall Hereford HR5 3LW Tel: +44 (0) 1544 340120 Fax: +44 (0) 1544 340129 www.russianaeros.com ail Forum - ">http://www.matronics.com/Navigator?Yak-List ; - MATRONICS WEB FORUMS - matronics.com ;- List Contribution Web Site - ; -Matt Dralle, List Admin. ://www.matronics.com/contribution http://www.matronics.com/Navigator?Yak-List http://forums.matronics.com http://www.matronics.com/contribution -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ________________________________ Message 9 _____________________________________ Time: 10:59:25 AM PST US From: l29delfin Ck5vIHNxdWVsY2ggb24gYmFrbGFuIDUuIMKgUHJvYmFibHkgbmVlZCByZXBhaXIgdG8gc3B1NyBh dWRpbyBhbXBsaWZpZXIgYW5kIGludGVjb21lIGJveC4gwqBXaG8gY2FuIHJlcGFpcj8KQm9iCgpT ZW50IGZyb20gbXkgVmVyaXpvbiBXaXJlbGVzcyA0RyBMVEUgc21hcnRwaG9uZQ= ------------------------------------------------------------------------------------- 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.