CPP stands for Controllable Pitch Propeller. CPP control the propeller pitch position . It also controls engine speed in combined and split modes. It can be interfaced with any type of engine or gearbox configuration.     

When the vessel is fully loaded with cargo, the propulsion required is much higher than when the vessel is empty. By adjusting the blade pitch, optimum efficiency can be obtained and fuel can be saved. The pitch can be made greater when the vessel is light, and made finer when loaded without having to vary the engine rpm, and still provide maximum use of the engine's power.    

Pulse Control is a simple and economical answer to overcome the limitations of Conventional ON/OFF Servo Control and Dowty Servo Valve Control. The output of pulse control will be square pulses having a fixed frequency. The pulse width can be adjusted and controlled.  Therefore travel speed can be controlled by varying the pulse width as per the requirement.    

To avoid mechanical jerk the pitch movement should gradually increase from zero to maximum while starting. Similarly the movement should be gradual while stopping.  In the remaining part of the span, pitch movement speed can be faster as it will not cause any mechanical jerk. This can be easily achieved by controlling the pulse width. In this case normal ON/OFF solenoid valves can be used, which are trouble free, less expensive and easy to maintain.    

TECHNICAL SPECIFICATIONS:  

PULSE CONTROL VER 3 CARD

Type / Model: -           CPP URO/CPP 110906

Size: -                       100mm x 150 mm    

Material: -                  Glass epoxy double sided PCB

Operating voltage: -     + 15, -15 VDC.

Power consumption: -    3.6 W

Rated current: -           300 mA

Resolution: -                0.5 degree

Working Temp: -           5 to 55 degree centigrade