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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