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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 velocity prediction program (VPP) is a computer program which solves for the performance of a sailing yacht in various wind conditions by balancing hull and sail forces. VPPs are used by yacht designers, boat builders, model testers, sailors, sailmakers, also America's Cup teams, to predict the performance of a sailboat before it has been built or prior to major modifications.
Provides a consistent layout for summary information about sailboats, to appear at the top right of article pages. Template parameters [Edit template data] This template prefers block formatting of parameters. Parameter Description Type Status fetchwikidata fetchwikidata 'ALL' means that data will be automatically included from Wikidata when available; 'none' or blank (default) will not fetch ...
For the International rule, the rating number is approximately equal to the sailing length of the hull. These boats have long overhangs which allow the waterline length to increase as the boat heels over. A displacement hull's maximum speed (the hull speed) is directly proportional to the square root of its waterline length. [2] The first ...
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The boat has a draft of 3.00 ft (0.91 m) with the centerboard extended and 4 in (10 cm) with it retracted, allowing operation in shallow water, beaching or ground transportation on a trailer. [1] [2] The design has a hull speed of 4.92 kn (9.11 km/h). [2]
The Dutchman's log could be used with a brass tobacco box, rectangular with rounded ends. This box had tables on it to convert log timing to speed. [5] [6] Mariners have used the log for a long time. The first known description of the device in print is in A Regiment for the Sea by William Bourne, in 1574.
The boat has a draft of 7.42 ft (2.26 m) with the standard keel fitted. The boat is fitted with a Universal M-25 diesel engine of 30 hp (22 kW). The fuel tank holds 40 U.S. gallons (150 L; 33 imp gal) and the fresh water tank has a capacity of 40 U.S. gallons (150 L; 33 imp gal). The boat has hull speed of 7.44 kn (13.78 km/h).