![]() Because of a crash during one of the tests, the Navy decided not to pursue testing of a 100-knot (115-mph/185-kph) foil system. In 1963, FRESH-1 achieved 84 knots (96 mph/155 kph), breaking a long-standing record set by Alexander Graham Bell in 1919. The foil system was designed to allow the boat to travel beyond speeds that produce cavitation. At high speeds, a void or bubble called a "vapor cavity" can be formed, resulting in reduced efficiency and erratic operation. ![]() Boeing designed FRESH-1 to investigate a phenomenon known as cavitation. These surfaces were connected to a pioneering automatic control systems that sensed and controlled the boat’s height above water as well its pitch, roll and heave.īoeing Model 883, or FRESH-1 (for "foil research experimental supercavitating hydrofoil"), was part of the U.S Navy’s research into hydrofoils. It had fully submerged foils with movable surfaces for stability and control. The 20-foot-long (6-meter-long) Little Squirt provided information on foil depth, speeds, operation in rough water and operation amid debris. ![]() Water was pumped from a scoop built into the rear foil and out through a nozzle into the air behind the boat. In 1962, Boeing built Little Squirt as a company-sponsored research craft, powered by a Boeing Model 520 turbine engine. A controllable fixture mounted between two prows held models of hydrofoils in the water during the test runs. Powered by an Allison J-33 jet engine, the HTS was designed to provide a level and stable platform for straightaway runs of up to 132 knots (115 mph/185 kph). It was a dual-cockpit jet-powered hydroplane that served as an aquatic version of a wind tunnel. The hydrodynamic test system (HTS), called the Boeing "Aqua-Jet," was launched in 1961. ![]() In 1959, Boeing began research and development of hydrofoils.
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