Boulton & Paul P.71A
|Boulton-Paul P.71A G-ACOX Boadicea|
|Role||Mail plane/Light Transport|
|Manufacturer||Boulton & Paul Ltd|
|Primary user||Imperial Airways|
|Developed from||Boulton Paul P.64 Mailplane|
The Boulton & Paul P.71A was a 1930s British twin-engined all-metal biplane transport aircraft developed by Boulton & Paul Ltd from the unsuccessful P.64 Mailplane to meet an Imperial Airways requirement for a mail plane.
The P.71A was the successor to the Boulton & Paul's first attempt to meet the airline requirement, the P.64 Mailplane. The P.71A was lighter, slimmer and longer and used Armstrong Siddeley Jaguar IVA radial piston engines.
Two aircraft were built and delivered to Imperial Airways at Croydon Airport in February 1935. The airline had lost interest in using them as mailplanes, so the two aircraft were converted as VIP transports with 13 removable seats.
Data from Flight - Imperial Airway's Latest 
- Length: 44 ft 2 in (13.47 m)
- Wingspan: 54 ft 0 in (16.46 m)
- Height: 15 ft 2¼ in (4.63 m)
- Wing area: 718.5 ft² (66.8 m²)
- Empty weight: 6,100 lb (2,772 kg)
- Max. takeoff weight: 9,500 lb (4,318 kg)
- Powerplant: 2 × Armstrong Siddeley Jaguar VIA radial engine, 490 hp (365 kW) each
- Maximum speed: 195 mph  (170 kn, 314 km/h)
- Cruise speed: 150 mph (130 kn, 242 km/h)
- Range: 600 mi (522 nmi, 966 km)
- Service ceiling: 21,000 ft (6,400 m) 4,500 ft (1,370 m) on one engine
- Rate of climb: 1,400 ft/min (7.1 m/s)
- Wing loading: 13.2 lb/ft² (64.6 kg/m²)
- Power/mass: 0.10 hp/lb (0.17 kW/kg)
- Related development
- Flight 31 January 1935, p.118.
- Donald 1997, p.178.
- "Imperial Airways' Latest". Flight. No. 31 January 1935. 31 January 1935. pp. 118–123.
- The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing.
- Donald, David (ed) (1997). The Encyclopedia of World Aircraft. Leicester, UK: Blitz Editions. ISBN 1-85605-375-X.
- Jackson, A.J. (1974). British Civil Aircraft since 1919. London: Putnam. ISBN 0-370-10014-X.
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