Dave,
Thanks for an attention getting answer!
Cleve
A198 MonoXS
On Fri, 01 February 2002, "Dave Simpson" wrote:
>
> There's a bit of an airworthiness issue involved here.
>
> The tailplane, like the rest of the structure is proven to take certain
> loads calculated from speeds and control surface deflection. In the case of
> the tailplane/elevator, it's either 1/3 full deflection at max dive speed
> (actually around 1.1 x Vne) or full deflection at Va, whichever is the
> greater. So if the surface and its supporting bits are stressed for these
> loads, then it should not be permitted to experience more than these in
> service, otherwise we're nibbling away at the safety margins.
>
> Roughly the load on the tailplane is proportional to its deflection. So an
> increase from +4 deg. to +6 deg. results in a 50% increase in load.
>
> So you might break it off.
>
> Dave
>
>
> ----- Original Message -----
> From: <DJA727@aol.com>
> Subject: RE: Tailplane mass balance stops
>
>
> > A question,
> >
> > If you have a 6 degree travel at full deflection and 4 degrees is
> required, why would that be a problem? I would think that less that 4
> degrees would be a problem, not more. One problem I have dealt with is the
> definition of the neutral point of the elevator. I have the required travel
> up and down, but it really hinges (no pun intended!) on where you make that
> point of zero degrees. One would hope to never actually hit that limit of
> travel unless in an emergency.
> >
> > Just wondering out loud.
> >
> > Dave Anderson A227
> >
>
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