CX2 bottom blades stop spinning

[BallRoom Dancer]

I crashed my CX2 in some heavy wind. Since then, the bottom blades aren't working properly. They spool up "ok" with the top blades but just as the rpm builds to the point where the heli starts to get light on its' skids, the bottom blades stop spinning. Any suggestions? Is the 3-in-1 unit bad?

[LockMD]

My first guess would be the motor.....I know you say it spools up and all but motors (I have come to learn) do all sorts of weird stuff. I always that it works or dont but my cp pro has taught me otherwise.

[BryMeister]

There are really only 2 possibilities: the motor or the 3-in-1. I would replace both motors with X180 motors to start. They aren't all that expensive.

[58Gemni]

one more possibility...... I had the same problem after a crash. the outer shaft was slipping inside of the gear. it is only a press fit. at slow speed the lower blades would turn but give it the gas, and it slips.