so i was making a helicopter and noticed that my main rotor (the small one) was having a seizure. I am not sure what's going on. It violently took itself apart a few times. Couldn't use the bigger main rotor because it's a small helicopter. But i did try the big ones and that one also had the same problem. What's going on?
This is the heli in question, if you were wondering

Incase it's important, I was trying to match it with its real world counterpart(the collective range,pitch range, roll range, power center off mass position etc)