Variable Pitch // Constant Speed Propeller
A variable pitch propeller (VPP) or controllable
pitch propeller (CPP) is a special type of propeller with blades that can be rotated around their long axis to change their pitch – manual transmission in a car.
A constant speed propeller (CSP) is a type of propeller that can change its blade pitch automatically to take better advantage of the power supplied by an engine in much the same way that an automatic transmission in a car takes better advantage of its power source.