WebJan 24, 2024 · The semi-planing boat's optimal speed is around Froude's length number, FnL, 0.7. At this speed, the wave formation is most favorable. L is the wave shaping length, and it is not the same as the length of the waterline. The wave shaping length is intimately connected with the longitudinal metacenter radius. WebMar 1, 2013 · The characteristics of planing hull shapes, such as deadrise angles, and the shape or the number of chines, have significant influences on the hydrodynamic …
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WebMar 26, 2024 · Hulls for ships are, viewed from the shape of the hull under the water line, generally classified into three categories: a displacement type hull for a low speed range, a semi-planing type hull for a medium speed range and a planing type hull for a high speed range. ... An advantage of a waterjet propulsion system in the semi-planing hull is ... WebMar 1, 2013 · Furthermore, planing hulls may have various cross-section shapes such as straight, convex, concave, etc. It is focused on the conceptual design for a small planing hull in this study. So afterbody cross-sections of the hulls are designed as straight shapes which show typical characteristics of planing surfaces. st michaels organ recital
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WebChined hulls may have one of three shapes: Flat-bottom chined hulls; Multi-chined hulls; V-bottom chined hulls. Sometimes called hard chine. Each of these chine hulls has its own … WebJan 21, 2015 · Semi-displacement (semi-planing) yacht hull design. Fn: 0.6 1.1; Average power requirement: 10hp/ton 40hp/ton; Prismatic coefficient: 0.63 0.68; LCB: 0.53 0.57 … WebThe results of a systematic series of small (5 ft) models of hulls typical of coastal patrol, training, or recreational powerboats are presented and discussed. Hull form parameters studied include length-to-beam ratio, displacement-length ratio, longitudinal position of the center of gravity and section shape (hard chine or round bilge). st michaels park chester