Aerocrusher is an electric powered model correct? And, the battery pack your flying with, is it nimh battery? Reason I ask is....
new nimh packs should be cycled about 5 times before they get up to the performance and duration level. All new battery packs
should be charged the 1st time at 1/10 C to set up the cells and then cycled 5 or 6 times. Example....you have a new GP 1100
battery pack. Initial charge should be at 110 milliamps or lower (use a wall wart charger to do this unless you have one of the newer
chargers). I charge all my new battery packs with a futaba and hitec wall wart charger. The output is 55 milliamps at 9.6 volts.
I learned the hard way along time ago...had a hitec sky scooter...bought a new 1600 nimh pack. Charged it and tried to fly plane.
Underpowered and it crashed busting the nose off and bending the motor shaft.

Dave...