The C.9 became La Cierva’s first autogyro that did not utilize an existing aircraft fuselage. In 1926, the UK Air Ministry placed an order for the construction of two light autogyro prototypes, featuring a fuselage similar to the Avro 504.
Pioneering Design and Development
In the summer of 1927, two autogyros were built: a single-seater, designated Avro Type 576 (J8931), and a two-seater, the Avro Type 581. The C.9 autogyro, equipped with a 70 hp (52.2 kW) Armstrong Siddeley Genet engine, made its first flight in Hamble in September 1927.
It featured landing gear like the Avro 504N, and ailerons, rudder, and elevator similar to those on the Avro 558 biplane. Advertising and demonstration flights did not lead to commercial success, and in January 1930, it was transferred to the London Science Museum.
Legacy and Prototypes
The second prototype also failed to generate interest and was subsequently used for experimental versions of the famous Avro Avian biplane.
Technical Specifications
| Modification | C.9 |
| Main rotor diameter, m | 9.14 |
| Length, m | 7.47 |
| Empty weight | 370 |
| Normal takeoff weight | 487 |
| Engine type | 1 Piston engine Armstrong Siddeley Genet |
| Power, hp | 1 x 70 |
| Crew, crew members | 1 |
Image and diagram gallery of the Cierva C.9 Autogyro
 C.9 |
 C.9 |
 C.9 |