Brandon Fosdick wrote:

> Stall is not a function of pitch angle, its a function of angle of attack and
> airspeed, which are related. As long as the autopilot has a control law wrapped
> around the airspeed and knows not to go below the stall speed, it should be
> fine. Adding an angle of attack sensor will help to.

As I understand it, stalling on ONLY a function of angle of attack.

You can stall a plane at and attitude, at high speed, and you can also
fly a plane below the stall speed (however you need altitude to regain
flight energy before loading the wings).

To verify this, if the wing has 0g loading, how can it stall. However,
if you are below the stall speed and the wing loading goes above 0g,
then the lift bank balance is in arrears and it will stall. Same thing
flying at the stall speed, there's nothing left in the lift bank for the
wings. Lowering an aileron in this state will stall that wing
immediately. Disasterous near the ground.

As my areobatics instructor stresses, pull the stick back to position
'X' at any speed and the wings will stall, so you may be better
monitoring the back pressure on the "stick" to detect when a stall is
imminent.

--
Best regards

Tony

mICros
http://www.bubblesoftonline.com
mailto:sales@bubblesoftonline.com

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