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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.
Windfoiling (or foil windsurfing) is a surface water sport that is the hydrofoiling evolution of windsurfing, as well as typical sailing boats and sailing hydrofoils. It uses similar equipment to windsurfing with a normal or slightly evolved rig on a normal or specialist foil board .
Hydrofoil kiteboards are foilboards which use a kite as their mode of propulsion. [17] [18] [19] The hydrofoil minimizes the effects of choppy or rough conditions. Due to the hydrofoil's underwater characteristics, the rider can angle higher into the wind than on traditional kiteboards which ride on the surface of the water. [citation needed]
The Turya class is a derivative of the Shershen-class torpedo boat.A hydroplane was added forward to increase speed. These boats can operate at 40 knots at sea state 4 and 35 knots at sea state 5.
A sailing hydrofoil, hydrofoil sailboat, or hydrosail is a sailboat with wing-like foils mounted under the hull. As the craft increases its speed the hydrofoils lift the hull up and out of the water, greatly reducing wetted area, resulting in decreased drag and increased speed. A sailing hydrofoil can achieve speeds exceeding double and in some ...
Bell's experimental HD-4 hydrofoil in the museum. Designed for anti-submarine duty, it held the world's marine speed record for several years. Alexander Graham Bell National Historic Site is a 10-hectare (25-acre) property in Baddeck , Cape Breton , Nova Scotia , Canada, overlooking the Bras d'Or Lakes . [ 1 ]
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The Waszp can start to hydrofoil in 7 kn (13 km/h) of wind, sustain hydrofoiling in as little as 5 kn (9 km/h) of wind and can reach a top speed of 24 kn (44 km/h). [ 3 ] The Waszp is similar to the developmental Moth class , but as a one-design class with aluminum foils it is half the price and thus appeals to a wider group of sailors.