A hydrofoil is a lifting surface, or foil, that operates in water.they are similar in appearance and purpose to aerofoils used by aeroplanes. boats that use hydrofoil technology are also simply termed hydrofoils. as a hydrofoil craft gains speed, the hydrofoils lift the boat's hull out of the water, decreasing drag and allowing greater speeds.. What is a primary concern is the design of the foil, the struts/supports, and their positioning. all these features have to be taken in consideration. so the features are designed to produce a minimum speed that will lift the boat of certain weight and keep it foilborne.. This will not make you an expert, but should help you understand some of the tradeoffs in foil design (all designs are a compromise after all, as for any given boat there is no one perfect design for all sailing conditions and sailing styles). while foil design may in fact be rocket science, don't be afraid..
Alongside the foil development process, a vital part of the analysis comes from the velocity prediction program (vpp) in which a numerical model of the hull with rig and appendages in sailing conditions is run to provide the boat speed, heel angles, resistance factors and much other information.. Verify lift and drag characteristics. export the foil shape as a file to be read by wings or loft to design the keel. to make foil design easier and faster, the foil shape, fairing curves, area coefficient, position and amount of thickness are all updated as a b-spline vertex is moved with the mouse.. This work is licensed under a creative commons attribution-noncommercial 3.0 unported license . introduction. some years ago, i wrote design and construction of centerboards and rudders.this was a compilation of information, comments and suggestions from various experienced people..
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