I'm stumped! I've got 2 Dragonflies of my own and have had no problem repairing them. Now I've got one to repair for a customer and I can't figure it out.

It's gone through 2 of the mixer boards in about as many flights; no throttle or tail rotor control. Replace board, all is fine. Tried different Rx then Tx first, no effect. Definitely the boards failing.

After replacing the 2nd board it seems to lose tail rotor authority after a minute or so in hover. Both of mine did the same thing (motor was failing when hot, replacing tail motors fixed them). I replaced the tail motor on this one and it still does the same thing (loses tail rotor). Gyro gain is cranked all the way up.

Any ideas? Has anyone had new tail motors go "bad" right away?

Tony Pacini
Valley Hobby Shop