The next critical mod is to get the wobbling motion out of the main gear. Apply this for the 22D
helicopter also. Make sure there's backlash between these two gears. Adjust the position of the
motor and Loctite the motor mounting screws as you see here next to the motor pinion gear. There
can be lots of backlash here.
Remove battery and push clips out of the way. Remove the setscrew completely from bottom
silver gear hub. Now pull the gear downwards and off the shaft. Next, remove the four screws from
the top which seat the gear onto the hub. Apply Loctite to each and replace just to the point of
being snug. Put the whole thing back on the shaft and replace botton setscrew with Loctite,
tightened.
Replace the battery in the clips and plug into receiver. Turn on your transmitter with throttle at idle.
Now raise the throttle just to the point of slow motor rotation. Watch the gear riding up and down
on the motor pinion. Using judgment, adjust and tighten the four gear screws accordingly to get
the gear to ride centered on the pinion without wobbling. It's not easy, but can be done and will
improve power output of the motor and battery efficiency.
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