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A
Cleaver is a type of
propellerA propeller is a type of fan that transmits power by converting rotational motion into thrust. A pressure difference is produced between the forward and rear surfaces of the airfoil-shaped blade, and a fluid is accelerated behind the blade. Propeller dynamics can be modeled by both Bernoulli's...
design especially used for
boat racing-Types:* Canoe racing, competitive forms of canoeing and kayaking* Drag boat racing, a form of drag racing which takes place on water rather than land* Dragon boat racing, a type of human-powered watercraft racing...
. Its leading edge is formed round, while the trailing edge is cut straight. It provides little bow lift, so that it can be used on boats that don't need much bow lift, for instance Hydroplanes, that naturally have enough hydrodynamic bow lift.
To compensate for the lack of bow lift, a hydrofoil may be installed on the lower unit. Hydrofoils reduce bow lift and help to get a boat out of the hole and onto plane.
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