TheCierva C.25 was a British 1930s single-seat autogiro produced byComper Aircraft Company Ltd ofHooton Park, Cheshire.

The sole C.25, based on the airframe of theComper Swift with modified tailfins and short low-mounted wings, received the civil registrationG-ABTO. It was the first autogiro to use thePobjoy Cataract 7-cylinder geared radial engine.^[1][2]

Data from Cierva C.25 Blueprint^[3]

General characteristics

• Crew: 1
• Length: 17 ft 8.5 in (5.398 m) fuselage only
• Wingspan: 13 ft 6 in (4.11 m) wings only
• Powerplant: 1 ×Pobjoy R 7-cylinder geared radial piton engine, 85 hp (63 kW)
• Main rotor diameter: 27 ft (8.2 m)
• Main rotor area: 572.63 sq ft (53.199 m²)
• Propellers: 2-bladed fixed-pitch propeller, 6 ft 6 in (1.98 m) diameter

Performance

• Cierva aircraft
• Autogyros
• Single-engined tractor autogyros
• Low-wing aircraft
• 1930s British experimental aircraft
• Aircraft first flown in 1933
• Comper aircraft

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• Use British English from January 2018
• Articles with short description
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