At this point, we’re ready to fly.  However, I want to ensure the tail servo sub-trim is set.

I’ve configured the pitch-throttle curves to allow me to power up the helicopter without it actually taking off.  The goal is to make the helicopter ‘lite-on-its-skids’ to see if the tail will drift to one side or the other.


  • Power up helicopter.
  • Increase throttle, but don’t move the thumbstick side-to-side.
  • Observe the tail.

Here is a video:

Helicopter – Preflight Testing