[kaji]

Trimming out the Helli should be done as close as possible during the mechanical setup using your instructions. Servo arms and linkage as close to 90 degrees as possible, swash plates level. Trim sliders on radio should be to centered. On nitro chops the throttle trim(closed) is used to kill engine.( other methods available on computer radios). Hemi is correct. When the chop lifts off the ground you want it to stay in the same area as long as possible. In a well trimmed chop that may be 10 seconds. You don't want it drifting hard in one direction where you the have to fight the stick bringing it back. If it drifts hard to the right then slide the trim to the left till it stops the drift. If you set it up the mechanics correctly it wont be to much to get it stable. Large planes have trim wheels. If the nose drops, the pilot turns the wheel back until trimmed, and he can take his hands off. Most important is mechanical set up being right. Remember, chopper flying is constantly correcting the drift of the bird. Perfect trim, means one spot, hands free.