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Old 05-08-2007 | 07:50 PM
  #1639  
Stick Jammer
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From: Crete, IL
Default RE: Nitro models pusher Bobcat?

ORIGINAL: XJet

I flew mine on the weekend (ASP (Magnum) 52 with 10x7 prop) and it flew about how I figured it would except...

On takeoff (after lifting off) it wants to climb very steeply, needing about 1/3 down elevator to stop it going vertical. This isn't the "leap off the deck syndrome).

The faster it flies (at full throttle) the more it wants to tuck it's nose down though. If I do a high-speed run I have to use increasing back-pressure on the stick to keep it level -- but once it slows down it starts to climb agressively again.

I'm wondering if it's that lifting tail section providing an increasing amount of lift (thus pitching the nose down) as the airspeed goes up.

Right now it's quite manageable but not a characteristic I enjoy. My CG is about 10.25 inches and it needs a good dose of down elevator to stay straight and level when inverted (indicating to me that the CG could/should go back further).
I'm beginning to think there is a lot of inconsistancy in the production of the tail booms/stabilizer in regards to incidence. Someone else reported the same problems you are having while others are flying with a 10.25" CG and no problems at all. How does yours react in full power vertical? Staight down at idle?