---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Sun 12/14/03: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:05 AM - Whiskey Compass Fix (Aubrey Price) 2. 07:38 AM - louvers (Barry Hancock) 3. 09:05 AM - Louvers for Yak 52's and CJ6's "To have or not to have" that is the question (Mark Schrick) 4. 11:46 PM - Re: Louvers for Yak 52's and CJ6's "To have or not to have" that is the question (Stuart Mackereth) ________________________________ Message 1 _____________________________________ Time: 06:05:45 AM PST US From: Aubrey Price Subject: Yak-List: Whiskey Compass Fix --> Yak-List message posted by: Aubrey Price I thought some of you might find this of interest. The whiskey compass in our YAK52 was unusable. Most of the fluid had leaked out and it was difficult to see the compass card. I removed the compass, removed the small screw in the back, drained what little fluid was left and unscrewed the back of the case. It was so tight I had to use a heat shrink gun to heat the ring before I could loosen it. The glass was yellowed so I started on a mission to make it usable. I tried using fine buffing compound to polish the inside, in doing that I broke the plastic partition inside. Don't worry. It is easier to work on without the partition. Home Deport and Lowe's sale a Plexiglas repair kit that will fix it in seconds. Even better is the glue from places that specialize in Plexiglas. After polishing the inside I started on the outside. The Russians used black paint on everything except a small window. Light doesn't't penetrate black paint well. I used a mild paint remover to loosen the paint on the Plexiglas housing. Then I used my high-speed buffer with extra fine polishing compound to buff the outside of the compass Plexiglas housing. I put everything back together and used warm clear lamp oil to fill the compass. It gives better damping that kerosene or some other liquids. I left a small bubble of air in the housing. Most American compasses use a rubber diaphragm on the back that expands with temperature. The Russians must not have seen a need for this. Warm oil and the bubble should take care of expansion in the summer. I reinstalled the compass and did a compass swing. The clear Plexiglas lets light pass through, so I can finally see the compass card. It looks like a new one now and works just as well. Aubrey Price N288Y ________________________________ Message 2 _____________________________________ Time: 07:38:27 AM PST US Subject: Yak-List: louvers From: Barry Hancock --> Yak-List message posted by: Barry Hancock On Saturday, December 13, 2003, at 11:58 PM, Yak-List Digest Server wrote: > PSS, I'm not flying right now due to lack of gill louvers. I've seen 3 or 4 Yak/CJ's without the louvers and just scratched my head. There's usually sound engineering principals behind major systems in an airplane...right? The Russians might be, well, Russian, but they ain't dumb. If they weren't necessary then I would think some newer aircraft (Yak-52TW) would go without a way to control CHT. But hey, if you only want to fly when it's warm...... Barry Hancock Director of Operations Red Stars, Inc. 949.300.5510 www.allredstar.com "Communism - Lousy Politics, Great Airplanes" ________________________________ Message 3 _____________________________________ Time: 09:05:36 AM PST US From: "Mark Schrick" Subject: Yak-List: Louvers for Yak 52's and CJ6's "To have or not to have" that is the question --> Yak-List message posted by: "Mark Schrick" The new Yak 52TW DOES NOT have louvers mostly due for the WWII look of the airframe. What it does have is gills in the back of the cowling exits to act as cowl flaps. This has worked for the 52TW and for other Russian radial engines. The standard louvers of a Yak 52 still work better than even the cowl flaps on a Yak 52TW. The key idea is if you have louvers....KEEP THEM ON and maintain them often. They are important both in cold and warm conditions. Maintain your friction control also, if it were to loosen in flight, the control can creep back and close the gills causing the oil temp to reach dangerous conditions. I have seen this happen. The friction lock is critical to precise engine temp control. Good luck, Mark "SHREK" Schrick Aerostar Western Region Dealer of Yak 52TW & Fully overhauled Yak's, "We help you meet your budget" YAK Driver, Inc 966 Wallace Drive San Jose, Ca 95120-1848 Hm/Fax (408) 323-5150 Cell (408) 391-6664 Email schrick@pacbell.net Website www.YAKDRIVER.com -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Barry Hancock Subject: Yak-List: louvers --> Yak-List message posted by: Barry Hancock On Saturday, December 13, 2003, at 11:58 PM, Yak-List Digest Server wrote: > PSS, I'm not flying right now due to lack of gill louvers. I've seen 3 or 4 Yak/CJ's without the louvers and just scratched my head. There's usually sound engineering principals behind major systems in an airplane...right? The Russians might be, well, Russian, but they ain't dumb. If they weren't necessary then I would think some newer aircraft (Yak-52TW) would go without a way to control CHT. But hey, if you only want to fly when it's warm...... Barry Hancock Director of Operations Red Stars, Inc. 949.300.5510 www.allredstar.com "Communism - Lousy Politics, Great Airplanes" ________________________________ Message 4 _____________________________________ Time: 11:46:54 PM PST US From: "Stuart Mackereth" Subject: RE: Yak-List: Louvers for Yak 52's and CJ6's "To have or not to have" that is the question --> Yak-List message posted by: "Stuart Mackereth" Yep, this happened to me just the other day.. the gills blew closed in the circuit, and interestingly I noticed the CHT's shoot up into deep red before noticing any change in the Oil Temps? And they dropped back very quickly when reopening the gills. Preflight, preflight, preflight... On another note, an acquaintence had a gear up on this last weekend in his 52 .. and he's looking for paddles (without the hub), if anyone has anyone has any old ones lying about (after your MT upgrade, of course) or any good prices, plz contact me off list. Tks [I was there at the scene, and was quite amazed at how well the gear up landing system works! No loss of control at all - and a nice shower of sparks from the flaps!] -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Mark Schrick Subject: Yak-List: Louvers for Yak 52's and CJ6's "To have or not to have" that is the question --> Yak-List message posted by: "Mark Schrick" The new Yak 52TW DOES NOT have louvers mostly due for the WWII look of the airframe. What it does have is gills in the back of the cowling exits to act as cowl flaps. This has worked for the 52TW and for other Russian radial engines. The standard louvers of a Yak 52 still work better than even the cowl flaps on a Yak 52TW. The key idea is if you have louvers....KEEP THEM ON and maintain them often. They are important both in cold and warm conditions. Maintain your friction control also, if it were to loosen in flight, the control can creep back and close the gills causing the oil temp to reach dangerous conditions. I have seen this happen. The friction lock is critical to precise engine temp control. Good luck, Mark "SHREK" Schrick Aerostar Western Region Dealer of Yak 52TW & Fully overhauled Yak's, "We help you meet your budget" YAK Driver, Inc 966 Wallace Drive San Jose, Ca 95120-1848 Hm/Fax (408) 323-5150 Cell (408) 391-6664 Email schrick@pacbell.net Website www.YAKDRIVER.com -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Barry Hancock Subject: Yak-List: louvers --> Yak-List message posted by: Barry Hancock On Saturday, December 13, 2003, at 11:58 PM, Yak-List Digest Server wrote: > PSS, I'm not flying right now due to lack of gill louvers. I've seen 3 or 4 Yak/CJ's without the louvers and just scratched my head. There's usually sound engineering principals behind major systems in an airplane...right? The Russians might be, well, Russian, but they ain't dumb. If they weren't necessary then I would think some newer aircraft (Yak-52TW) would go without a way to control CHT. But hey, if you only want to fly when it's warm...... Barry Hancock Director of Operations Red Stars, Inc. 949.300.5510 www.allredstar.com "Communism - Lousy Politics, Great Airplanes" = == direct advertising on the Matronics Forums. == == ==