Custom-tuning - Modifications - Calculations

The good performance of almost any powerboat depends to a large extent on the performance of its propellers. Apparently minor modifications on blade geometry can have very important effects on the overall performance of most vessels. 

To calculate the needed propeller for a specific boat, you must know at least

      - Hull dimension
  - length
          - total weight

  - engine data
                                - number of engines and model
      - horsepower
            - r.p.m. at full gas

- gear ratio
                  - (engine revs / prop revs)

         - expected speed
 

    
  «I've appreciated Tobias Schnebli's skills ever since he started to work for ROLLA as marine propeller manufacturer and production manager thirty years ago»
Phil Rolla, founder of ROLLA Propellers