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  2. Cierva Autogiro Company - Wikipedia

    en.wikipedia.org/wiki/Cierva_Autogiro_Company

    Cierva W.9 (first flight 1945) - experimental helicopter to E.16/43, used shaft-driven hydraulically-actuated tilting hub for rotor control, and blown air for torque control and direction, one built Cierva W.11 Air Horse (first flight 1948) - heavy lift helicopter development of W.6 design, two built

  3. Cierva W.11 Air Horse - Wikipedia

    en.wikipedia.org/wiki/Cierva_W.11_Air_Horse

    The Cierva W.11 Air Horse was a helicopter developed by the Cierva Autogiro Company in the United Kingdom during the mid-1940s. The largest helicopter in the world at the time of its debut, the Air Horse was unusual for using three rotors mounted on outriggers, and driven by a single engine mounted inside the fuselage.

  4. Cierva CR Twin - Wikipedia

    en.wikipedia.org/wiki/Cierva_CR_Twin

    The Cierva CR Twin (originally designated CR LTH.1 and also known as the Grasshopper III) was a five-seat utility helicopter that first flew in the UK in 1969. It was a joint development between Cierva Autogiro Company and Rotorcraft now a subsidiary of Cierva, based on the dynamic systems of the latter company's Grasshopper design.

  5. Cierva C.30 - Wikipedia

    en.wikipedia.org/wiki/Cierva_C.30

    Cierva C.30A AP506 (smashed wreck) on display at the Helicopter Museum, Weston-super-Mare, England. Cierva C.30A AP507 on display at the Science Museum in London, England. Avro Rota I HM580 the former G-ACUU is on display at the Imperial War Museum Duxford, England. United States. Cierva C.30A K4235 on display at Fantasy of Flight, Polk City ...

  6. Juan de la Cierva - Wikipedia

    en.wikipedia.org/wiki/Juan_de_la_Cierva

    De la Cierva's motivation was to produce an aircraft that would not stall but near the end of his life he accepted the advantages offered by the helicopter and began the initial work towards that end. In 1936, the Cierva Autogiro Company, Ltd. responded to a British Air Ministry specification for a Royal Navy helicopter with the gyrodyne.

  7. List of rotorcraft used in World War II - Wikipedia

    en.wikipedia.org/wiki/List_of_rotorcraft_used_in...

    Avro 671 "Rota" Mk.1 (licence-built Cierva C.30A) (general purpose autogyro - used for radar station testing) Bristol "Heliogyro" RI/II (experimental helicopter) Cierva W.5 - 2-seater twin outrigger rotor helicopter, first flight 1938. Cierva W.6 - twin rotor helicopter, flown in 1939; Cierva W.9 - jet efflux torque compensation design. Built ...

  8. Cierva W.9 - Wikipedia

    en.wikipedia.org/wiki/Cierva_W.9

    The Cierva W.9 was a British 1940s experimental helicopter with a three-blade tilting-hub controlled main rotor, and torque compensation achieved using a jet of air discharged from the rear port side of the fuselage. The design was not further developed into production, and the prototype crashed in 1946.

  9. Autogyro - Wikipedia

    en.wikipedia.org/wiki/Autogyro

    De la Cierva's direct control was first developed on the Cierva C.19 Mk. V and saw the production on the Cierva C.30 series of 1934. In March 1934, this type of autogyro became the first rotorcraft to take off and land on the deck of a ship, when a C.30 performed trials on board the Spanish navy seaplane tender Dédalo off Valencia.