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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 ...
A polar diagram, or polar plot, is a graph that shows a sailboat's potential speed over a range of wind speeds and relative wind angles. [1] It normally consists of the right side of a line chart with the radius representing the yacht speed and the angle representing the wind direction blowing from top to bottom. Several lines are normally ...
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.
Jun. 12—ST. JOHN, Wash. — Sprint boats plowing around hairpin turns at up to 80 mph through a narrow ditch 3 feet deep, while spraying spectators with a rooster tail wake. That's what's in ...
Kiteboating is the act of using a kite rig as a power source to propel a boat; Kneeboarding is an aquatic sport where the participant is towed on a buoyant, convex, and hydrodynamically shaped board at a planing speed, most often behind a motorboat. Paddleboarding, where a person uses a large surfboard and paddle to surf on flat water or waves
Drua, also known as na drua, n'drua, ndrua or waqa tabu ("sacred canoe", Fijian pronunciation: [waᵑɡa taᵐbu]), is a double-hull sailing boat that originated in the south-western Pacific islands. Druas do not tack but rather shunt (stern becomes the bow and vice versa).
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 ...