Propulsion

The easiest and cheapest low-maintenance solution is installing a fixed propellor version. The alternative option is installing a CPP (Controllable Pitch Propellor). This system is very robust and reliable, but it will add a bit of complexity and extra costs.

The advantage is that it allows you to choose the optimum main engine RPM to suit the conditions. A pyrometer in the exhaust elbow is necessary to ensure the engine is not overloaded with a CPP. On average, a CPP means using less fuel and causing less engine noise because of the lower revs. The best info on Controllable Pitch Propellers can be found on Michael Kasten’s page: CPP.

The in-between solution is AutoProp propulsion, which gives one automatic variable pitch. Compared to a fixed propellor, it is more efficient (up to 15%) in putting more power/thrust into the water and increasing fuel efficiency.

Drawings and cutting files are available for all models for fixed and CPP versions.