Engine cooling fan clutch locked up.
With a propeller.
If your car makes a squealing sound when you are turning it is because your brakes have worn out. When the brakes wear down below a certain point, a wire pops loose. That makes a squeaking sound.
A propeller is connected to a drive shaft which is connected to an engine that runs the same way as a car
driving shaft, propeller shaft, Cardan shaft
An engine driving a propeller or a turbine causes thrust.
It's the engine that makes the propeller go fast, not the number of blades.
An aircraft gets thrust from an engine, either a piston engine driving a propeller or a jet driving a turbine.
My question is: What sound does a lion make ? Roar.
The pitch of the propeller causes this noise.
they make powerful propeller sounds.
Sounds like a belt or belt tensioner needs to be replaced
You should check the struts.