Cierva C.9

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Cierva C.9
Cierva C. 9 L'Aéronautique November, 1928.jpg
Type: Gyroplane
Design country:

United KingdomUnited Kingdom United Kingdom

Manufacturer:

Cierva Autogiro (construction),
Avro (license production)

First flight:

September 1927

Number of pieces:

1

The Cierva C.9 (Avro 576) was a gyroplane of the designer Juan de la Cierva , a copy in the UK in from the late 1920s Avro was made.

history

After the successful demonstrations of the Autogiros Cierva C.6B built in Spain , the British Aviation Ministry placed another order in January 1926 for the construction of two gyroplanes, which, unlike the C.6C (Avro 574) and C.8L Mk.I (Avro 575) should be based on the Avro 504 . The result was a machine covered with plywood - the Avro 576 . It was constructed like a typical single-seat biplane, but the upper wing was missing. The landing gear was that of the Avro 504N , the machine had ailerons, and the rudder and elevator were similar to the controls mounted on the Avro 558 . At Cierva Autogiro , the Avro 576 was named Cierva C.9 in the design series .

When Avro chief test pilot Bert Hinkler took off for the first flight with the 576 in September 1927 , a 70 hp (52.2 kW / 70.97 hp) Armstrong-Siddeley Genet in-line engine drove a four-bladed 30-ft rotor, which September 1928 was replaced by a rotor with about half the diameter in further tests.

The attempts with the Avro 576 did not lead to a commercial success and are only considered a development step towards the larger and more motorized autogiros, on which Avro worked together with Cierva until the mid-1930s; the unique piece was given to the Science Museum London in January 1930 .

The second building contract from the ministry received a fuselage with two seats, ultimately without a rotor and under the type designation Avro 581 became the first prototype of the later successful Avro-Avian series.

Technical specifications

Parameter Data
crew 1
length 7.47 m
Rotor diameter 9.14 m
Empty mass 370 kg
Max. Takeoff mass 487 kg

See also

literature

  • Planes from A – Z - Cierva Autogyros . In: AERO - The illustrated compilation of aviation. No. 51, pp. 1424 ff., 1984, Marshall Cavendish.
  • AJ Jackson: Avro Aircraft since 1908 , Putnam, 1965, 2nd edition 1990, ISBN 0-85177-834-8 , p. 241 f.

Web links

Commons : Cierva C.9  - collection of images, videos and audio files