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  2. University of Maryland Gamera II - Wikipedia

    en.wikipedia.org/wiki/University_of_Maryland...

    The Gamera II is a quadrotor helicopter purpose-designed to attempt an official flight duration record sanctioned by the National Aeronautic Association, and is a step in the progression of designs built to meet the criteria of the 1980 American Helicopter Society Igor I. Sikorsky Human Powered Helicopter Competition.

  3. Piasecki X-49 SpeedHawk - Wikipedia

    en.wikipedia.org/wiki/Piasecki_X-49_SpeedHawk

    The Piasecki X-49 "SpeedHawk" is an American four-bladed, twin-engined experimental high-speed compound helicopter developed by Piasecki Aircraft.The X-49A is based on the airframe of a Sikorsky YSH-60F Seahawk, but utilizes Piasecki's proprietary vectored thrust ducted propeller (VTDP) design and includes the addition of lifting wings.

  4. List of United States military helicopters - Wikipedia

    en.wikipedia.org/wiki/List_of_United_States...

    Light observation helicopter Bell Aircraft Corporation: Bell 47 variant. 1945 1946 2407 Bell H-12: Military utility helicopter Bell Aircraft: Company Model 48: 1946 Never 13 [3] Kellett XR-10: Military transport helicopter Kellett Autogiro Corporation Prototype. Program canceled 1949. 1947 Never 2 Sikorsky S-52: Utility helicopter Sikorsky ...

  5. Hiller Aircraft - Wikipedia

    en.wikipedia.org/wiki/Hiller_Aircraft

    The company was renamed Hiller Helicopters in 1948. It was involved in the development of a number of prototype helicopters. It was involved in the development of a number of prototype helicopters. From the early 1960s to 1969, its Palo Alto plant served as a CIA cover for the production of the CORONA reconnaissance satellites .

  6. Hiller YH-32 Hornet - Wikipedia

    en.wikipedia.org/wiki/Hiller_YH-32_Hornet

    The Hiller YH-32 Hornet (company designation HJ-1) is an American ultralight helicopter built by Hiller Aircraft in the early 1950s. It was a small and unique design because it was powered by two Hiller 8RJ2B ramjet engines mounted on the rotor blade tips which weigh 13 lb (5.9 kg) each and deliver an equivalent of 45 hp (34 kW) for a total of 90 hp (67 kW). [3]

  7. Sikorsky VH-92 Patriot - Wikipedia

    en.wikipedia.org/wiki/Sikorsky_VH-92_Patriot

    The Sikorsky/Lockheed Martin VH-92 Patriot [4] is an American helicopter operated in the United States Marine Corps' Marine One U.S. presidential transport fleet. It is a militarized variant of the Sikorsky S-92 and is larger than the former Marine One helicopters.