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No-Vac at speed, 1933 Miss Jarvis on transport trailer, 2010 Hydroplane Miss America II on the Maumee River in Toledo, 1920. A hydroplane (or hydro, or thunderboat) is a fast motorboat, where the hull shape is such that at speed, the weight of the boat is supported by planing forces, rather than simple buoyancy.
Hull speed or displacement speed is the speed at which the wavelength of a vessel's bow wave is equal to the waterline length of the vessel. As boat speed increases from rest, the wavelength of the bow wave increases, and usually its crest-to-trough dimension (height) increases as well. When hull speed is exceeded, a vessel in displacement mode ...
Royal Navy World War II motor torpedo boat planing at speed on calm water showing its hard chine hull - note how most of the forepart of the boat is out of the water. At rest, a vessel's weight is borne entirely by the buoyant force. Every hull acts as a displacement hull at low speeds: the buoyant force is mainly responsible for supporting the ...
The design of watercraft requires a tradeoff among internal capacity (), speed and seaworthiness.Tonnage is important for transport of goods, speed is important for warships and racing vessels, and the degree of seaworthiness varies according to the bodies of water on which a watercraft is used.
A motorboat with an outboard motor. A motorboat or powerboat is a boat that is exclusively powered by an engine; faster examples may be called "speedboats".. Some motorboats are fitted with inboard engines, others have an outboard motor installed on the rear, containing the internal combustion engine, the gearbox and the propeller in one portable unit.
Hydrofoil high-speed boat Meteor on Lake Ladoga, Russia. Passenger hydrofoil Flying Dolphin Zeus moving at high speed near Piraeus, Greece. Meteor service between Saint Petersburg, Russia and the Kronstadt, a strongly fortified Russian seaport town, located on Kotlin Island, near the head of the Gulf of Finland. It lies thirty kilometers west ...
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Apparent wind is the wind velocity (direction and speed), V A, measured aboard a moving sailing craft; it is the net effect of the boat wind, V B —the air flow over the craft induced by its speed over the earth (equal to in magnitude, but opposite in direction to the craft's speed)—and the true wind, V T.