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Old 10th October 2000 | 13:31
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John Farley
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Unhappy

WW

Not wishing to nitpick, but accuracy is everything.

With a normal cable controlled aircraft the feel you get is not for the aircraft (if only it was) it is just a measure of the hinge moments you are applying to the moveable surfaces.

The force feedback in a flyby wire aircraft (what you feel through moving the controller – whether that controller is a side stick, a centre stick or a yoke) is determined by what the design team think is best for that aircraft type. Simple spring centring (double the force for double the input deflection) is one commonly used arrangement. Others use a speed squared term (similar to what you get from a cable system) but anything is possible. It is just another design choice like high or low wings or whatever.

JF