CP propeller
The CP Propellers have a range from 1000 mm – 6000 mm in diameter. They can be delivered with 3, 4 or 5 blades. The propeller hub and blades are made in Ni.Al. -Bronze and can also be delivered in stainless steel. The pitch is adjusted by a pull- push rod inside the hollow propeller shaft. It transfers the axial force from the servo piston mounted inside the gearbox.
Propeller design
All ships have individual needs. To satisfy these needs Finnøy uses the most suitable software together with their experience when designing propeller blades. Propeller blades are designed for best possible performance regarding thrust, efficiency, noise and vibration. The blades are machined and balanced according to ISO 484 standards.
Benefits of controllable pitch propellers compared to fixed propellers:
•Secure and precise manoeuvrability
•An increase in the average speed
•Stern tube wear is reduced
•A constant speed at engine is possible
•Easy replacement of spare blades
•Engine wear is minimized
•Reduced fuel costs
•Dynamic position of vessel possible
•Stepless speed control of the ship
•Load control of engine is possible
•Full power available under all conditions
•The propeller can be designed for free running and towing
Nozzle
For vessels that require maximum towing thrust, a nozzle could be fitted. The nozzle increases the bollard pull by approx. 30-40% compared to an open propeller absorbing the same power. It can be delivered as a fixed nozzle or rudder nozzle.
The fixed nozzle- NaCa 19A profile
This is the “standard” nozzle that gives high nozzle thrust in towing condition and is a excellent choice for trawlers, tug boats, AHTS etc.
The fixed nozzle -Finnøy high speed profile
This nozzle is designed to give the same nozzle thrust as 19A type at low speed. However this nozzle is designed to reduce drag at a higher speed.
Rudder Nozzle
No need of rudder as a fixed rudder plate is mounted on the nozzle. Larger propeller diameter as the propeller center can be moved astern.