The tunnel is manufactured in steel with a stainless ring in way of the propeller. From 100HP and up there is a choice of electric motor, hydraulic motor or diesel engine. The CP gearboxes are specially designed for use with CP propellers, and have a built-in servo for the pitch change push rod. A wide range of reductions is available. Input torque from 500Nm to 35000Nm.
All sizes have ground, case hardened, helical gears.
A special feature is the modular PTO system to drive hydraulic pumps or generators. All PTO s have an individual hydraulic clutch. All manoeuvring is done with the propeller pitch. Propellers and all modern marine diesel engines. The nozzles are built of steel with a stainless steel ring in way of the blade tips.