The Aquafoil with its cambered pitch face, continues to be one of the most sophisticated standard propellers available anywhere, which is why it is used as standard equipment by the most discerning manufacturers of high speed craft.The Aquafoil 55 has 3 blades, whilst with 4 blades and 73, 80 or 87 % DAR it is ideal for applications where high horsepower is being transmitted or where the propeller is running in a tunnel.