|Mar 24, 2015, 11:38 PM|
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.
|Mar 25, 2015, 07:28 AM|
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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