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De la Cierva had fitted the rotor of the C.4 with flapping hinges to attach each rotor blade to the hub. The flapping hinges allowed each rotor blade to flap, or move up and down, to compensate for dissymmetry of lift, the difference in lift produced between the right and left sides of the rotor as the autogyro moves forward. [14] [16] Three ...
In 1966, Juan de la Cierva was inducted into the International Aerospace Hall of Fame for his innovation in rotor blade technology, using them to generate lift and to control the aircraft's attitude with precision. [9] The Juan de la Cierva scholarship from the Spanish Ministry of Science in named after him. [10]
Juan de la Cierva's first British-built autogyro was the C.8 design.It and some other designs were built in conjunction with Avro.The pre-war Cierva C.30 proved popular. . Nearly 150 were built under licence in the United Kingdom by Avro, in Germany by Focke-Wulf, and in France by Lioré-et-Oliv
Juan de la Cierva designed a new rotor with a second linkage on the hub to correct the overstrain to eliminate cyclic stresses. To the existing one of abatement that eliminated the problem of lift asymmetry, a second one was added, which was designated as a drag joint , which allowed the blade to oscillate in the plane of rotation.
The Cierva C.30 is an autogyro designed by Juan de la Cierva and built under licence from the Cierva Autogiro Company by A V Roe & Co Ltd (Avro), Lioré-et-Olivier and Focke-Wulf. Design and Development
The Cierva C.4 was an experimental autogiro built by Juan de la Cierva in Spain in 1922 which early the following year became the first autogyro to fly successfully. Failures of De la Cierva's attempts to compensate for dissymmetry of lift with the C.1, C.2, and C.3 autogiros, led him to consider alternative means of enabling an autogyro to fly without rolling over.
De la Cierva's first successful autogyro, the Cierva C.6, used an Avro 504 fuselage, and this led to a long and close collaboration between de la Cierva and Avro from 1926 onwards, with de la Cierva providing the rotor design, and Avro the airframe from designs that often appeared as both fixed-wing and rotary aircraft. There was a long series ...
Diagram of fully articulated main rotor head. Juan de la Cierva developed the fully articulating rotor for the autogyro. The basis of his design permitted successful helicopter development. In a fully articulated rotor system, each rotor blade is attached to the rotor hub through a series of hinges that let the blade move independently of the ...