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Old October 28th 08, 09:12 PM posted to rec.aviation.homebuilt
Gregory Hall
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Posts: 26
Default Lancair Legacy Design Flaw?


"Bryan Martin" wrote in message
...
That could only happen if the plane was loaded with the CG way aft of
the limit. Otherwise, the plane would pitch DOWN if the stabilizer
stalled because the stabilizer normally produces a down force to keep
the nose up.



If it worked that way it would be a built-in safety factor helping to
forestall a stall of the main wing. But suppose the motor died and the
aircraft was then a glider. One must glide nose down. The horizontal
stabilizer forcing the nose down would then cause the pilot to pull back on
the stick to counteract the forces for aft. If the stabilizer stalled in
this attitude the nose is supposed to pitch down but would it? The tail
might just continue to drop provided the main wing still gets traction??? CG
is dependent upon both lifting both control surfaces as well as weight
distribution.
--
Gregory Hall


In article ,
"Gregory Hall" wrote:

http://www.youngeagles.org/photos/gallery/Monoplanes/LancairLegacy2000.jpg

Look at the picture. It's easy to see why the Lancair is dangerous. The
horizontal stabilizers appear to be on the too small side. This would
result
in their stalling before the wing. Then the aircraft would pitch up
making
the main wing stall. Ill-conceived, IMO.

A good lawyer needs to get on this with respect to BadWaterBill's
untimely
demise.

--
Gregory Hall


--
Bryan Martin
N61BM, CH 601 XL, Ram Subaru, Stratus redrive.