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Old 04-04-2004 | 06:29 PM
  #8  
Tall Paul
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From: Palmdale, CA
Default RE: Tail Incidence

ORIGINAL: BMatthews

... Paul, is that sort of what you were implying? This may also show up when you first advance the throttle for takeoff. Just be ready with a bit more up elevator than normal and be sure to release it as the speed, and the tail, comes up. Of course if it is a larger model and the stab is mounted higher or it's got trike gear then this probably won't be noticable.
.
A buddy built an ARF Cessna which took forever to get off the ground, but once it did, it popped off and flew way too fast.
I flew it once, and when I landed it, measured the horizontal incidence relative to the wing... serious leading edge up on the horizontal, which forced the nose wheel into the ground until it got enough airspeed to rotate and fly.
One of the things we do in the Kadet Team is add about 1/4" leading edge up to the horizontal when building the fuselage.
Or raise the wing trailing edge about the same amount. The result is the upper speed limit on the plane increases, with not too much degradation of the low-speed stuff.
Ty's problem will be a bit more serious on takeoffs, since he has no nose wheel, and might he be prepared to have some up-trim in at takeoff, if the incidence is really as he says.
Hold up elevator though is an invitation to a tip-stall at liftoff.