On January 7, 1927, the Cierva C.6C was flying at 30 m (98 ft), when one of its blades detached from the hub. The autogyro began to descend vertically at almost normal speed for autorotation. At 6 m (20 ft) from the ground, a second rotor blade came off. The pilot Courtney was fortunately only slightly bruised. The reaction of the British Air Ministry to this accident, was the suspension of all autogyro flights in Great Britain until a solution was found to the detachment of the blades in flight.
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. He could not carry out the tests with this new configuration with the prohibition against flight still in place, so de la Cierva moved to Madrid to work on the C.7; there it was fitted with a new double-jointed rotor head. After carrying tests, including flights with Juan de la Cierva as a passenger, it was concluded that the appropriate solution had been reached. In addition it gave a much smoother flight.[1][2]
Variants
C.7
Two-seater gyroplane with a 300 hp Hispano Suiza engine.
Wikimedia Commons has media related to Cierva C.7.
^Enciclopedia Ilustrada de la Aviación: Vol.5 (Edit. Delta ed.), Barcelona, 1983, p. 1153, ISBN84-85822-52-8
^. tiroalcorcon.com. Archived from the original on 27 August 2008. Retrieved 12 January 2022.
^Volumen número 12 de la colección Arca del Ateneo. (1996, ISBN84-88175-10-8).
January 06, 2023
cierva, experimental, autogiro, designed, juan, cierva, built, late, 1920s, aeronatique, january, 1927role, experimental, autogyromanufacturer, loring, workshopsdesigner, juan, ciervafirst, flight, november, 1926primary, user, spanish, ministry, contents, deve. The Cierva C 7 was an experimental autogiro designed by Juan de la Cierva and built in the late 1920s C 7Cierva C 7 at L Aeronatique in January 1927Role Experimental autogyroManufacturer Loring WorkshopsDesigner Juan de la CiervaFirst flight November 15 1926Primary user Spanish Air Ministry Contents 1 Development history 2 Variants 3 Specifications C 6 4 See also 5 ReferencesDevelopment history EditOn January 7 1927 the Cierva C 6C was flying at 30 m 98 ft when one of its blades detached from the hub The autogyro began to descend vertically at almost normal speed for autorotation At 6 m 20 ft from the ground a second rotor blade came off The pilot Courtney was fortunately only slightly bruised The reaction of the British Air Ministry to this accident was the suspension of all autogyro flights in Great Britain until a solution was found to the detachment of the blades in flight 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 He could not carry out the tests with this new configuration with the prohibition against flight still in place so de la Cierva moved to Madrid to work on the C 7 there it was fitted with a new double jointed rotor head After carrying tests including flights with Juan de la Cierva as a passenger it was concluded that the appropriate solution had been reached In addition it gave a much smoother flight 1 2 Variants EditC 7 Two seater gyroplane with a 300 hp Hispano Suiza engine C VII Denomination given by the Loring company Specifications C 6 EditData from 3 General characteristicsCrew one Length 29 ft 6 in 9 m Max takeoff weight 1 984 lb 900 kg Powerplant 1 Hispano Suiza 8F 9 cyl air cooled rotary piston engine 300 hp 220 kW Main rotor diameter 32 ft 10 in 10 m Main rotor area 845 5 sq ft 78 55 m2 Propellers 2 bladed fixed pitch wooden propellerPerformance Maximum speed 62 mph 100 km h 54 kn See also EditRelated lists List of experimental aircraftReferences Edit Wikimedia Commons has media related to Cierva C 7 Enciclopedia Ilustrada de la Aviacion Vol 5 Edit Delta ed Barcelona 1983 p 1153 ISBN 84 85822 52 8 Pagina nueva 2 tiroalcorcon com Archived from the original on 27 August 2008 Retrieved 12 January 2022 Volumen numero 12 de la coleccion Arca del Ateneo 1996 ISBN 84 88175 10 8 Retrieved from https en wikipedia org w index php title Cierva C 7 amp oldid 1106294100, wikipedia, wiki, book, books, library,
