If it's speed you're after…look no further than CompuSki.

Basically, the blade shape section of this propeller is parabolic and raked aft rather than flat as is conventional.

This parabolic blade design reduces water "slipping off" the cupped blades and therefore creates greater efficiency from a more direct forward drive.

This propeller is ideal for ski racing and high speed use, particularly with boats using a step up gear ratio.