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|The word "hydroplane" usually refers
to a three point suspension craft. A three point hydroplane has two
planing surfaces (sponsons) forward that are lower than the main
hull and are outboard on either side. The third point is the
propeller at the aft end of the boat. Hydroplanes use aerodynamics
to force a cushion of air beneath the boat and at full speed only
the front sponsons and the propeller at the rear of the boat should
be touching the water. The concept of such a three pint
suspension craft was developed and patented by Amo Apel in 1936.
The modern day hydroplane is a refinement of this design principle. Hydroplanes require relatively calm water to
run well and are not intended for rough water conditions.
Hydroplanes do not turn easily because they have so little hull in
the water. To compensate a skid fin has been added to the back of
the left sponson.