Duellist maiden- with Jett FIRE 50's and pipes
06-13-2007, 10:10 AM
#26
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Join Date: Nov 2004
Location: Montreal,
QC, CANADA
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RE: Duellist maiden- with Jett FIRE 50's and pipes
ORIGINAL: Build-n-flyer-RCU
The good news, I got the engines synched much better and resolved the flutter problem on my Duellist.
The bad news, I re-kitted the plane Sunday due to a dumb landing error on my part (see the twins forum for details). It was my first crash in 3 years of flying twins.
It will take a while to get it repaired and flying again.
A new question- with the flutter gone I was able to get the engines completely up on the pipes and really build serious speed. But it would eventually reach a speed where the airplane began oscillating up and down (porpoising?). No flutter noise, just a slight pitch up then down maybe a few times per second. Has anyone seen this before? What could cause it?
Walt
The good news, I got the engines synched much better and resolved the flutter problem on my Duellist.
The bad news, I re-kitted the plane Sunday due to a dumb landing error on my part (see the twins forum for details). It was my first crash in 3 years of flying twins.
It will take a while to get it repaired and flying again.
A new question- with the flutter gone I was able to get the engines completely up on the pipes and really build serious speed. But it would eventually reach a speed where the airplane began oscillating up and down (porpoising?). No flutter noise, just a slight pitch up then down maybe a few times per second. Has anyone seen this before? What could cause it?
Walt
For your Oscillating trouble. (assuming there is no flutter or loose parts on the airplane)
Just put more weight in the nose. Advance your balance point 1/4" at the time. Until you can fly it full speed without oscillations. The plane will become very stable at high speed but will be less manoeuvrable at lower speed...
