RCU Forums - inverted engine quit

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stumpknocker

04-01-2009 07:34 PM

inverted engine quit

whats up? i have an avistar with a os 40la. right after i do loop, the engine almost quits or quits. i know i didn't make the clunker hose too long but i did notice that the hose was thicker than the one i had before. i'm thinking that it might not be as flexable with it being a short length. another thing is the muffler, where the two pieces come together, it leaks quite a bit of oil there. i'm wondering if it might be loosing pressure. i've also heard that it could be the gas foaming from vibration.i'm going to replace the clunker hose, seal up the muffler, and try to dampen the vibration. has anybody had this problem? am i missing anything?

w8ye	04-01-2009 07:45 PM

RE: inverted engine quit

You are headed in the right direction

jimmyjames213

04-01-2009 08:08 PM

RE: inverted engine quit

Quote:

ORIGINAL: stumpknocker

whats up? i have an avistar with a os 40la. right after i do loop, the engine almost quits or quits. i know i didn't make the clunker hose too long but i did notice that the hose was thicker than the one i had before. i'm thinking that it might not be as flexable with it being a short length. another thing is the muffler, where the two pieces come together, it leaks quite a bit of oil there. i'm wondering if it might be loosing pressure. i've also heard that it could be the gas foaming from vibration.i'm going to replace the clunker hose, seal up the muffler, and try to dampen the vibration. has anybody had this problem? am i missing anything?

are you to lean? , on ground hold the airplane vertical (engine up) at full throttle if the engine starts to loose rpm's then your to lean

stumpknocker

04-01-2009 08:31 PM

RE: inverted engine quit

ok, i'll check if it's too lean like you said. your talking about the regular adjustment with knob, not the one with the screw right?

w8ye	04-01-2009 08:42 PM

RE: inverted engine quit

The knob

bonebreak

04-01-2009 08:44 PM

RE: inverted engine quit

I had a similar issue, and it turned out that I had the clunk line and my fueling/de-fueling line switched so when the plane went inverted, the fuel was not being picked up.

stumpknocker

04-01-2009 10:43 PM

RE: inverted engine quit

thanx again

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