tommayer wrote:

Paul, Bill,
    Is Lenkite BS too?  I've been using it, at unsemmly cost, as a
prophalactic against valve sticking in Lycs and P&Ws, and have not have any
trouble since using it, but I keep thinking that's just how the ball has
bounced for 1500 hours or so.  Tom Mayer

I never heard of it. That valve sticking problem is a toughie. Lots of 
theories around on what causes it. According to John Schwaner of
the Sky Ranch Engineering Manual fame it is caused by high temperatures
in the exhaust valve guide oxidizing the oil. Seems to me a good 
high temp synthetic would help. Tom, please test some of the oil you are
using in your oven at 500 F and let us know how it works out.

John also says keep checking your valves for leaking. A leaking
valve runs at a higher temp and is more likely to stick.

I am sure glad we don't have exhaust valves in rotaries :-)

Paul Lamar
 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org