Thread: Methods for altitude changes
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Old April 14th 07, 10:41 PM posted to rec.aviation.piloting,rec.aviation.student
Just go look it up!
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Default Methods for altitude changes
On Sat, 14 Apr 2007 16:25:02 GMT, wrote:

In rec.aviation.piloting Mxsmanic wrote:
Snowbird writes:

I can see you have actually begun to learn something about autopilots. There
is more to the story, though. Would you believe some autopilots act on both
the control surface and the trim device?

There are several ways to implement an autopilot. But no autopilot is
designed to relieve control pressures.

Another true but worthless statement.

Hmm... Is it a true statement though? The King autopilots (and the
S-Tec range AFAIK) both are designed such that they use pitch servos
to reposition the control surface (elevator or stabilator) to affect
a change (climb, descent) and have inbuilt feedback generators to tell
the trim servo to actuate such that it removes the load from the
surface at its new position. That seems to be at least two systems
who's basic design incorporates a methodology to actively relieve
control pressures.