Hey,
I just bought a Walkera Dragonfly 36, and when I went to start the helicopter up the tail rotor didn’t move. I narrowed the problem down to the smaller gear coming off the main gear and the belt drive. The smaller gear moves when the main rotor is moving, but the belt drive doesn’t move at all, the belt drive is slipping, it doesn’t lock onto the shaft. If anyone knows why this is and how to fix it, I would greatly appreciate it. Thanks