Fully charged the choppers battery,the controller has all new batteries,turned on the chopper power switch,turn on te controller power switch and wait till light stops flashing.push on the power controll handle and there is nothing and then all at once the chopper takes off at full power and there is noway to controll the amount of power to the chopper and it stops and falls.other times it does not work at all.

The light will keep flashing unless you are on the correct channel A B or C and you hit the "Light" button on the front of the unit.

As far as the high speed take offs I suggest identifying which A B or C setting is correct for your copter. In order to do this turn off the RC controller. Set the Selector switch to "A" move the left joystick "throttle" half way up and then turn on the power. Assuming that the copter is still ON it will either fire up or do nothing. If it does nothing try the same sequence with the selector switch set to "B" and try again. If nothing try "C".

Now, as far as the rapid accelleration, I read one online comment that indicated that there is some type of "programming" sequence that the unit learns by pushing the left joystick throttle all the way forward and then back to zero when you start to fly it. So after the first "blast off" set the copter back down or even hold it in you hand by grasping the the landing runners and move the throttle forward until the rotor spin up and it lifts off. In your hand it is easier to keep it from going up too quickly.

Good luck!