Hydrodynamic design of planing hulls
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This web-page lets you investigate the required thrust [kg] and horse power [hk] as well as trim angle and porpoissing stability for a given planing boat and a given velocity range. The interested reader should read the original paper which gives more data on several topics : lift, drag, wetted area, center of pressure, porpoissing stability as a function of speed, trim angle, deadrise angle and loading. The paper may also help you to better understand the physics. Please remember that the calculated HP is the effect required from the propeller. The motor effect should be larger. For a good propeller : motor effect = HP/0.7 The calculatons on this page is valid for planing hulls only.
Reference : Savitsky, Daniel : "Hydrodynamic design of planing hulls", Marine Technology, Vol. 1, No.1, 1964. |