One piece casting – slim design
Asymmetric airfoil wingdesign
Twisting reduces rotational losses
Stainless steel or nickel aluminium bronze castings
The arrangement of the effect rudder and propeller cone is designed to gain some of the loss of rotational energy in the slip stream. The inclined water flow from the propeller generates a pressure and a suction side on the rudder blade. The seal between the rudder and the propeller cone forces the pressure balance to work in opposite direction of the rotating water flow from the propeller. This reduces the loss of rotational energy.
Most of Servogear effect rudders are made of high tensile stainless steel castings to reduce the blade thickness to a minimum, and they are also designed with progressive strength.