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The Sikorsky S-75 was a proof-of-concept all-composite helicopter. Sikorsky Aircraft used all- composite materials to replace metal to provide greater strength, lighter weight, lower manufacturing costs, and reduce maintenance costs.
The Bell 207 Sioux Scout is a modified Bell 47 helicopter, developed by Bell Helicopter under contract from the United States Army, as a proof-of-concept demonstrator for the Bell D-255 helicopter gunship design, featuring a tandem cockpit, stub wings, and a chin-mounted gun turret.
The idea of building VTOL aircraft using helicopter-like rotors at the wingtips originated in the 1930s. The first design resembling modern tiltrotors was patented by George Lehberger in May 1930, but he did not develop the concept further.
Bell 533 1962 – US Army high speed helicopter experiments; Boeing ecoDemonstrator 2012 – Airliner fuel efficiency and noise reduction technologies; Budd BB-1 Pioneer 1931 – Stainless steel construction; Burnelli RB-1 1921 – Lifting body proof of concept vehicle; Carlson-Lynch Vertipactor 1923 – Wingless VTOL aircraft; Chrysler VZ-6 ...
The Advanced Composite Airframe Program (ACAP) was an all-composite Sikorsky early LHX proof of concept aircraft. Designated S-75, it mated a new composite airframe with S-76 engines, rotors and powertrain components. [33] Sikorsky S-76 SHADOW Boeing-Sikorsky MANPRINT study.
The Advanced Composite Airframe Program (ACAP) was a 1985 all-composite LHX proof-of-concept project. The Bell D-292 used the Avco Lycoming engines, transmission, two-bladed main and tail rotors, tailboom, vertical fin, and rotor pylon of the 222. The D-292 had a new composite airframe. Bell 230
NASA's Ingenuity helicopter, which flew on Mars in April 2021, became the first aircraft to achieve powered, controlled flight on a planet other than Earth. ... (JPL) is working on a concept for a ...
The S-52 was the first helicopter to be flown in a loop, as flown by Harold E. Thompson on 19 May 1949. [ 5 ] The two-seat version was modified into the S-52-2, a four-seat helicopter using a 245 hp (183 kW) Franklin O-425-1 air-cooled flat-six, which was moved slightly to the rear to accommodate the enlarged cabin. [ 4 ]