Quick question for you guys..
I've seen that during the startup most aircraft (radial or inline) tend to make their engines spin clockwise and counter clockwise before setting the engine on idle RPM's, what is the reason behind this.. just warming up the engine?
Also.. when you hear the pistons, and the propeller not spinning or spinning very slowly, what controls this action? The engine roars as if it was at 100% throttle but the propeller barely spins.
Is there a shaft or something similar to a car that sets the prop to ''neutral'' so to speak?