The Airco DH.9C was a British passenger aircraft.
|Australian registered DH.9C G-AUED c.1923|
|National origin||United Kingdom|
|First flight||late 1921|
|Developed from||Airco DH.9|
Development and design
After World War I there were many surplus Airco DH.9 light bombers, designed by Geoffrey de Havilland, available for the emerging air transport business. At first stripped DH.9s were used to carry one passenger behind the pilot in the gunner's position, but later versions, designated DH.9B, added a second passenger seat ahead of the pilot. A second seat behind the pilot was added by extending the rear cockpit in the early DH.9C. Later DH.9Cs had this rear position converted to hold two passengers face to face, protected by a faired dorsal canopy or cabin. Most of these later four-seat aircraft had slight sweepback to counter the rearward shift in the centre of gravity.
The DH.9, DH.9B, and DH.9C were dimensionally similar, with the same wingspan and height and only small variations in length depending on the powerplant. They were two-bay tractor biplanes, with fixed two-wheel main and tail-skid undercarriage. Their structures were of spruce and ash, wire-braced and fabric-covered.
Nineteen aircraft were produced for operators, 13 in the United Kingdom, three in Australia, and three in Spain. The last in service was operated by Northern Air Lines in Barton, Greater Manchester, until 1932.
- Qantas (3 aircraft)
- Sneta (precursor to Sabena) (1 aircraft)
- Hejaz Air Force (2 aircraft)
- KLM (1 aircraft)
- Espanola del Trafico Aero (3 aircraft)
- Crew: 1
- Capacity: 4 (3 passengers)
- Length: 30 ft 6 in (9.30 m)
- Wingspan: 42 ft 45/8 in (12.92 m)
- Height: 11 ft 2 in (3.40 m)
- Wing area: 434 ft2 (40.3 m2)
- Empty weight: 2,600 lb (1,179 kg)
- Gross weight: 3,300 lb (1,497 kg)
- Powerplant: 1 × Siddeley Puma, 230 hp (172 kW)
- Maximum speed: 115 mph (185 km/h)
- Cruise speed: 95 mph (153 km/h)
- Range: 500 miles (805 km)
- Service ceiling: 19,000 ft (5790 m)
- Rate of climb: 660 ft/min (3.35 m/s)
- Sharpe, Michael (2000). Biplanes, Triplanes, and Seaplanes. London: Friedman/Fairfax Books. p. 25. ISBN 1-58663-300-7.
- Jackson pp121-35
- Jackson p.133
- Jackson pp. 132-5
- Jackson pp.20-2
- Jackson p. 130
- Jackson, A.J. De Havilland aircraft since 1909. London: Putnam Publishing Co. Ltd, 1978 ISBN 0-370-30022-X