Chainsaw Repair

An electric motor on the front of a plane makes noise too especially at full speed.

But pusher props make a lot of noise as described above.

At work we had a lot of server motors to drive machinery at regulated speeds. We had a new big furnace conveyor stop. But you could hear and feel the motor running but the output shaft was not turning. The problem, to make it short, was that there was extra friction in the conveyor system and indeed it was stalled - motor and all. But the electrical pulses were still going to the motor and making a noise and vibration as if the electric motor was running.  We had to install a more powerful motor and driver system on the machine.