Thought I would add to this thread since its been a while. I've been flying in the hangar for the past few weeks practicing backward flights in all directions. You gotta think which way the heli is pointed, not where its going. Anyway, last night the brushsless tail motor made a funny high pitched whine and went back to normal. The tail kicked out but went back to working quickly. Decided to get it on the ground before it could do it again. Before that happened, the tail motor was surging from nothing, to nearly full power. Axe was spinning both directions in greater than 180 degree arks. Tried to save it, but clipped the blades on the tips to the ground. Lost a servo, most tail mounting stuff, and all the other usual parts that break.

Now, I can replace the broken parts, but I still don't know what caused it. Ran the tail motor up and down for 5 minutes, and it never skipped a beat. Hate to replace everything just to have it happen again. When it works, its great, when it doesn't work, it sucks ( $$$, and big donkey .... )