I am very new to this but have had this issue also. i would hover the heli fine and then the next day when i started up, i noticed a tail wag. i could still hover but had to correct for the tail wag. I then started to loose power and was unable to throttle up. when 450 landed, i could immediately throttle up and get it to hover again..this was repeated at 2',4',6'. It happened at all heights. I finally landed and removed the canopy. The esc was hot to the touch and the motor was not much cooler. This is stock align 35amp and 430xl motor. I read forums and decided it could be the esc. I took it to a local hobby shop and this was confirmed. I had an esc kicking out. So i replaced with a CC Thunderbird 54amp and Scorpion 2221-8. This should solve my problems for awhile.</p>


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Rick</p>