Kevinator9:: ... CP: Collective Pitch. Altitude is changed by adding or decreasing main rotor speed and main rotor pitch angle at the same time or seperatley.
... "adding or decreasing main rotor speed" ... uhhh ... Not quit ... that would be fixed pitch (FP).
Ideally, the goal for CP helis is to have a constant RPM
It would have been a little more accurate to say this:
Altitude is changed by adding or decreasing engine power output (throttle) and main rotor pitch angle at the same time or seperatley while maintaining a constant RPM.