Controllable Pitch Propeller Hub

A controllable pitch propeller (CPP) is a propulsion device in which the pitch of the propeller blades can be adjusted according to the ship's operating conditions and navigation requirements. Compared with traditional fixed pitch propellers, it can change the thrust size and direction of the ship by changing the pitch of the blades while keeping the main engine speed constant, thereby achieving variable speed, reverse, and more flexible maneuverability of the ship.