I got the used Raptor V1.

I made my own training gear and tried to hover in my backyard.

However, I think I made a fairly hard landing (from 2 ft). Nothing seems broken though. Everything looks fine.

But the next time I tried to fly, the blade hardly turns even when the engine is screaming.

Also, I noticed that when I manually turn the main blade (engine off), the tail rotor is not turning sometimes. I used to remember the tail rotor always turns with the main blade correspondingly. But the belt is fine, nothing is the transmission seems off.

What's wrong? Thanks