International Hydrofoil Society Photo Gallery

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QUEST - Hybrid Hydrofoil/Hydrofoil Small Waterplane Area Ship (HYSWAS) 27-foot, 12-ton, 35-knot concept demonstrator, a potential near-term alternative for the US Navy's emerging need for an unmanned, high-speed, rough-water capable craft that is deployable from another vessel.




The general concept and predicted performance of the HYSWAS version of a PHM was described in a paper: "HYBRID HYDROFOIL-A Concept Whose Time Has Come", by Meyer, J.R., Intersociety Advanced Marine Vehicles Conference, Paper No. 89-1450, Washington, DC, June 1989. The hullform consists of a conventional monohull (PHM hull) form with the addition of a long, slender, single strut, and lower body added to its keel. The lower body and strut buoyant lift carries about 50 per cent of total foilborne design weight and is augmented by the dynamic lift from a fully-submerged foil system. Foil dynamic lift comes into play at. speeds of about 12 to 15 knots and above, at which time the upper hull is lifted from the water surface leaving only the small waterplane of the single strut at the Interface. As with the PHMs, the automatic control system would maintain predetermined flying height and provide a steady and stable platform in waves. The forces provided by the foils are sufficiently powerful to counter roll, pitch, and heave motions that would be imparted to a conventional monohull in high sea states. Propulsion for this configuration could be provided by a gas turbine engine driving through a mechanical Z-drive, or an electric transmission system, to a propeller at the stern of the lower hull. The concept was predicted to have very long range capabilities, both hullborne and foilborne at high speed in rough water compared to the PHM.

2400T Hydrofoil, Gruman
design during ANVCE
INTERFLIGHT HYDROFOILER - An experimental one-person hydrofoil intended to demonstrate the feasibility of a no-emissions personal watercraft... the world's slowest hydrofoil?! Concept Model . . . For further info click here for the BYYC
Futuristic (1973) hydrofoil concepts designed by Luigi Colani
An artists impression of the Supramar MT 250G design. Artwork was by Jochen Sachse in 1971 according to the signature at bottom of the photo / painting. This design was to be a 250 ton patrol boat to meet requirements established by West German and other NATO navies with a maximum foilborne speed of 60 knots. I suspect it was intended to compete against the PHM but I don't know the history. More details (and a smaller copy of the same artists impression) are in the 1974/75 issue of Jane's Surface Skimmers. (Description from Martin Grimm)

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