I've got a Airskipper 50, with a Futaba 401 gyro, with matching servo. During normal flight mode, the tail is locked in. When I switch to Idle Up, the tail drifts to the left about 2-3 degrees per second. I used about 10 units of sub trim to fix the drifting, but after about 5-8 min. of flight in Idle up, the tail started to spin around about 3 times before I was able to get it down ( Luckily no damage). I went up to the heli, and noticed gyro's red light was blincking red.
I took the sub trim out, and decided to fly it just in normal mode, I powered in off, and then back on, the gyro's red light became solid. I flew it for about 5 min. before the tail started to swing back and forth about 20-30 degrees.
Does anyone know what might be causing this problem, and how to fix it.
Thanks