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Old 11-22-2005 | 10:01 AM
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nmking09
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From: Niceville , FL
Default RE: Wing affect on horizontal stab

The high alfa tendency of T-tails that Red B. described is a very common phenomena among T-Tail business Jets. The wing !QUOT!washes out!QUOT! the tail and renders it ineffective. On an extra the tail is, for the most part, in-line with the wing. For a T tail what would actually happen at high alfa is the elevator basically would not work and cause the aircraft to violently pitch nose down. Or at the very least cause the plane to begin oscillating, possibly causing a possible lack of control. My spacewalker actually has this problem on landing, and it's not even a T-tail. I can tell because when I slow down to land I have to be very careful not to over correct the oscillation.

Bottom line, for structural reasons and aerodynamic reasons, leave the tail close to in-line with the wing.

Nmking09

beepee I'll run the numbers and get back to you on the tail sizing.