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For study purposes, a simplified model of a hydrofoil craft is constructed with the assumption that it has:heave only motion;no surface proximity effect on the foil;no foil broaching.It is then shown that a fully submerged hydrofoil, mounted at the bottom of rigid struts, can transmit large vertical force fluctuations to the hull, even in an idealized sinusoidal seaway because of the orbital velocity...
It has been known for half a century that the hydrostatic or buoyant force acting on a planing hull in motion is less than Archimedes' force, the weight of the volume of water displaced by the hull, and that this results in the low speed hump drag of a relatively deep draft vessel, such as a catamaran, being much greater than the conventionally calculated value. Payne [(1988) Design of High Speed...