Lynn,
 >
 > Tucker and the Extra-guys have a huge tail surfaces quite a long way back
 > from the CG and prop. Besides they do not do this stunts from a stand
still,
 > but fly into the positions with full power on and the according

slipstream

 > active on the control surfaces...
 >
 > Models fly in pea-soup!!
 >
 > Thomas J.

 Thomas is referring to the Reynolds number effect.
 Flies don't fly. They swim.

 Paul Lamar

The 25 pound Extra 300 is going about how fast when the rudder is sitting on
the black top, and the nose is straight up?

Shaun Tucker fly's a biplane, a bit larger than a Pitts, with about 400HP.
Maybe 900 pounds hanging on the prop, with the only relative wind available
being generated by the propeller. About a foot of each bottom wing involved. If
the wings fell off while he is doing this, it would just make the plane lighter.
He is using less than full power to do this as he leaves this stunt by
powering up and accelerating away vertically.

A ducted fan turning high RPM. Maybe without a reduction box. Ideal for the
rotary.
Higher RPM less torque reaction to deal with for each HP generated. The only
problem I see is the range.

Lynn E. Hanover

 
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