> The position feedback on a servo, on say the elevator, does not change the elevator position as a response to the pitch rate of
> the aircraft. The relationship of pitch rate to elevator stick position is open loop.
The feedback on a servo like elevator does not change the elevator position but it does try to maintain that fixed position regardless of what the aircraft is doing. So when pulling a half loop from the top from inverted, let's say with a fixed amount of elevator all the way round (stick back 10mm), the force on the elevator is less in the first quarter (to vertical) than the second quarter (to level flight), if the aircraft is speeding up, so the servo is automatically using more power in order to hold that fixed elevator position.
In the same way the motor control is trying to maintain a fixed position, in the case rpm, if the aircraft is speeding up.
Is there a difference?
Mike