nyc_863
02-20-2008, 04:49 PM
With the heli on a bench, I turn on the tx with zero throttle, then connect the battery and wait for everything to arm. Then I turn on throttle hold.
Now I look at the tail servo and tail and confirm all is about 50%, give or take. If they were not at mid point, then the arming process moves them there. At that point it appears the tail blades have some pitch but I'm led to believe this is desirable as the gyro needs to do less work if mechanically the heli at center position isn't doing a piro.
Now I flick the rudder to the left (or right) and what should happen on a properly setup machine?
a) the servo moves appropriately, then keeps creeping until it reaches match travel and binds
b) the servo moves appropriately, then creeps back to center
c) the servo moves appropriately, and stays there. Further flicks in the same direction move this "rest point" out further. Turning the heli in the direction the flick would have moved it if it were airbourne, one observes the servo slowly moving back to center with the turn.
d) something else?
If the desired action is (c) which I believe the finless bob trex tail setup video says, do I adjust sub-trim on the tx a few points left or right (rudder trim neutral) until (c) is achieved?
Now I look at the tail servo and tail and confirm all is about 50%, give or take. If they were not at mid point, then the arming process moves them there. At that point it appears the tail blades have some pitch but I'm led to believe this is desirable as the gyro needs to do less work if mechanically the heli at center position isn't doing a piro.
Now I flick the rudder to the left (or right) and what should happen on a properly setup machine?
a) the servo moves appropriately, then keeps creeping until it reaches match travel and binds
b) the servo moves appropriately, then creeps back to center
c) the servo moves appropriately, and stays there. Further flicks in the same direction move this "rest point" out further. Turning the heli in the direction the flick would have moved it if it were airbourne, one observes the servo slowly moving back to center with the turn.
d) something else?
If the desired action is (c) which I believe the finless bob trex tail setup video says, do I adjust sub-trim on the tx a few points left or right (rudder trim neutral) until (c) is achieved?