But in a CPP all these can be prevented by just changing the pitch of the propeller. This leads to high amount of power wastage and increased stresses on the propeller. In FPP the power generated by the engine and the propulsive forces produced by the propeller cannot be controlled. On the Contrary, CPP can move its blade in the desired position by changing the pitch of the blades. This means that the position of blades cannot be changed. Generally propellers are of two types– Fixed Pitch Propellers( FPP) and Controllable or Variable Pitch Propellers( CPP). The operating conditions of a propel-ler according to the propeller law valid for a propeller with fixed pitch are de-scribed for free sailing in calm weather, and followed up by the relative heavy/ light running conditions which apply when the ship is sailing and subject to. Of the propulsion theory is shown in Fig. If the RPM’s are too high, adjust the blades to a higher pitch setting using the REPITCHING procedure. ![]() Are too low, adjust the blades to a lower pitch setting. ![]() Run up the propeller to check your pitch for desired maximum RPM. Eliminating the need for a blade angle measurement device. Retighten bolts, carefully check pitch angle to make sure of correct angle when blade is secure. ![]() Blade Measurement and Adjustment Instructions For Style “C” Cast Aluminum Blade Propeller Fans (b) Position one blade as suggested in step #3(a) and loosen U-bolts or blade retention clamps until blade can be rotated to correct angle.
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