|M650 (mk2)||16 kg||
|M790 (mk2)||17 kg||
|M950 (mk2)||18 kg||
|M1070 (mk2)||19 kg||
Power increases with the square of boat speed. Model numbers (650, 790, 950 and 1070) refer to the height in millimeters from the water line to the centre of the mounting boss, when the vessel is not underway. This measurement allows for 200mm of stern wave for the Neptune rudder to be at its optimum level in the water when underway. To convert these measurements to inches, divide by 25.4, i.e. the M650 requires a measurement of 25.6 inches.
Colour coded rudder and airfoil