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  2. Kaman HH-43 Huskie - Wikipedia

    en.wikipedia.org/wiki/Kaman_HH-43_Huskie

    The Kaman HH-43 Huskie is a helicopter developed and produced by the American rotorcraft manufacturer Kaman Aircraft. [2] It is perhaps most distinctive for its use of twin intermeshing rotors, having been largely designed by the German aeronautical engineer Anton Flettner.

  3. Helicopter rotor - Wikipedia

    en.wikipedia.org/wiki/Helicopter_rotor

    An example of two-blade rotor is the Bell 212, and four blade version of this helicopter is the Bell 412. [23] An example of the effect of rotor blade number is the UH-72 ( EC145 variant ); the A model had four blades, but the UH-72B was changed to five blades which reduced vibration. [ 24 ]

  4. Bell XV-3 - Wikipedia

    en.wikipedia.org/wiki/Bell_XV-3

    The Bell XV-3 (Bell 200) is an American tiltrotor aircraft developed by Bell Helicopter for a joint research program between the United States Air Force and the United States Army in order to explore convertiplane technologies. The XV-3 featured an engine mounted in the fuselage with driveshafts transferring power to two-bladed rotor assemblies ...

  5. Coaxial-rotor aircraft - Wikipedia

    en.wikipedia.org/wiki/Coaxial-rotor_aircraft

    A rotor blade produces more lift in the advancing half. As a blade moves toward the direction of flight, the forward motion of the aircraft increases the speed of the air flowing around the blade until it reaches a maximum when the blade is perpendicular to the relative wind. At the same time, a rotor blade in the retreating half produces less ...

  6. Sikorsky R-4 - Wikipedia

    en.wikipedia.org/wiki/Sikorsky_R-4

    The R-4 was the world's first large-scale mass-produced helicopter and the first helicopter used by the United States Army Air Forces, [1] the United States Navy, the United States Coast Guard and the United Kingdom's Royal Air Force and Royal Navy. In U.S. Navy and U.S. Coast Guard service, the helicopter was known as the Sikorsky HNS-1.

  7. Vought-Sikorsky VS-300 - Wikipedia

    en.wikipedia.org/wiki/Vought-Sikorsky_VS-300

    It had a single three-blade rotor originally powered by a 75 horsepower (56 kW) engine. The first "free" flight of the VS-300 was on 13 May 1940. [2] The VS-300 was the first successful single lifting rotor helicopter in the United States and the first successful helicopter to use a single vertical-plane tail rotor configuration for antitorque.

  8. Rotorcraft - Wikipedia

    en.wikipedia.org/wiki/Rotorcraft

    A Bell 47 helicopter, an early example of a powered rotorcraft. A rotary-wing aircraft, rotorwing aircraft or rotorcraft is a heavier-than-air aircraft with rotary wings that spin around a vertical mast to generate lift. The assembly of several rotor blades mounted on a single mast is referred to as a rotor.

  9. Sikorsky CH-53K King Stallion - Wikipedia

    en.wikipedia.org/wiki/Sikorsky_CH-53K_King_Stallion

    The Sikorsky CH-53K King Stallion (Sikorsky S-95) [2] is a heavy transport helicopter designed and produced by Sikorsky Aircraft.The King Stallion is an evolution of the long running CH-53 series of helicopters which has been in continuous service since 1966, and features three up-rated 7,500 shp (5,590 kW) engines, new composite rotor blades, and a wider aircraft cabin than its predecessors.

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