Australia, NSW, Sydney
Joined Jul 2002
Servo current draw
Not sure if this is the right forum apologies in advance if not.
Assuming a constant air speed when using digital servos and the sticks on the TX are centered and not trimmed is the current draw minimized.
If the trims are used to stabilize/modify a flight path does this increase the current draw. If this is the case does re-centering the servo on the TX reduce the draw.
IF the model flies hands off with no aerodynamic trim, the servo loads are only from holding position with no aerodynamic load .
so no power required at servo
That condition does not exist !
There is always some load
The more offset in trim surfaces - The greater the aerodynamic loading the servo must combat. So-- more power will be required to hold the position The tx setting is not relevant here .
The servo CENTER can be changed and there will be no load (except idle current) when the model is parked and if the trim surface is perfectly counterbalanced
However-- any load will require servo power -no matter where the servo center may be
Back when we were doing big aerobatic models- ailerons and elevators sometimes were so heavy, the surfaces would fall to low position when model was parked and power was off ! (not my models - I balanced the surfaces .)
these things sucked a lot of power - just pulling surfaces to center - then holding them there against the engine shake and airframe vibrations.
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