Duncan
You are absolutely right. Serves me right for trying to think when it is late
at night or maybe I
have been sniffing too much resin.
I have been trying to think why there is a maximum downward deflection of the
stabs
and I cannot
think of any reasons! In 40 years of flying I can think of only one time when
I needed full
negative deflection and that was an unusual circumstance. I think now that any
limitation on the
stab movement is to limit attitude changes that will overload the wings.
Regards
Tom Friedland
McFadyean wrote:
> Eh?
> Upward deflection (ie TE moving upwards) will increase the negative lift, not
decrease it.
>
> Duncan McFadyean
>
> On Sunday, February 03, 2002 10:26 PM, Tom & Cathy Friedland
> [SMTP:tfriedland@attbi.com]
wrote:
> > Duncan
> >
> > Your symmetrical loading theory is probably erroneous. The stabilator is
> > normally loaded downward (negative lift) when it is in a neutral position.
> > Therefore, it will take less downward deflection to reach the critical
> > (breaking) point. Upward deflection (12 degrees) gets to overcome the
> > downward
> > loading before it even starts to give positive lift loads as it deflects
> > upward.
> >
> > Regards
> >
> > Tom Friedland A079
> >
>
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