A plane, or any of a number of planes, projecting from the hull of a submarine boat, which by being elevated or depressed cause the boat, when going ahead, to sink or rise, after the manner of an aƫroplane.
A projecting plane or fin on a hydroplane{3} to lift the moving boat on top of the water; also, a gliding boat.
a powered surface boat fitted with planes (hydroplanes{2}) projecting below the hull, designed to lift the boat, when moving rapidly, so that the hull itself is lifted out of the water and the boat is supported by the hydrodynamic forces of the water on the hydroplanes{2}, thus permitting higher speeds; formerly called a gliding boat.
Of a boat, to move through water while supported by hydroplanes{3} (see hydroplane{3}, above).
to move through a body of water supported by the hydrodynamic forces on a surface, similar in principle to a hydroplane{3}; -- said, e. .g, of automobiles skidding on a shallow patch of water on a road when moving at high speed, thus causing the tires to lose contact with the road surface.
A boat that skims over the surface of the water.
A powerboat designed so that the prow and much of the hull lift out of the water at high speeds, decreasing drag and therefore increasing speed. As a verb, to skim along the surface of the water.
A flat-bottomed craft designed to skim over the surface of the water. Seaplanes are said to hydroplane as soon as they have passed the hump speed during take-off and are supported by the hydrodynamic lift of the hull or floats.
a speedboat that is equipped with hydrofoils that lift it so that it skims the water at high speeds; "the museum houses a replica of the jet hydroplane that broke the record"
glide on the water in a hydroplane
a boat that is designed to ride lightly over the water, with only three points of her hull actually touching when underway, and with her propeller one blade at a time in the water
a plane that takes off on water and lands on water
a very balanced craft where the lift from the sponsons is countered by down force on the deck thus keeping the nose from getting too high