Boulton Paul Mailplane

infobox Aircraft
name = P.64 Mailplane
type = Mailplane/Light Transport
manufacturer = Boulton & Paul Ltd


caption =
designer = J D North
first flight = March 1933
introduced =
retired = October 1933
produced =
number built = 1
status = Destroyed
unit cost =
primary user =
more users =
developed from =
variants with their own articles = Boulton Paul P.71AThe Boulton & Paul P.64 Mailplane also known as the Mail-Carrier was a 1930s British twin-engined all-metal biplane transport aircraft designed for Imperial Airways and built by Boulton & Paul Ltd.

Development

The airline had a requirement, which was translated into Air Ministry specification 21/28, for a mailplane to carry a 1,000 lb (454 kg) payload on a 1,000 mile (1,609 km) leg at a reasonable speed. Boulton & Paul designed and constructed the prototype "P.64 Mailplane" to address these requirements. The aircraft (registered G-ABYK) first flew in March 1933 at the company Norwich. It was not a success, deemed to be expensive and unsatisfactory. It was destroyed during trials at Martlesham Heath when it struck the ground during an unexplained dive on 21 October 1933.

The company then addressed the specification's requirements with a new design transport aircraft which was lighter, slimmer and longer (the Boulton Paul P.71A).

pecifications

aircraft specification

plane or copter?=plane
jet or prop?=prop
ref=
crew=3 (2 pilots plus navigator or radio operator)
length main= 42 ft 6 in
length alt= 12.95 m
span main= 54 ft 0 in
span alt= 16.46 m
height main= 13 ft 0 in
height alt= 3.96 m
area main= 756 sq ft
area alt=
empty weight main= 7,008 lb
empty weight alt= 3,180 kg
loaded weight main=
loaded weight alt=
max takeoff weight main= 10,500 lb
max takeoff weight alt= 4,760 kg
engine (prop)=Bristol Pegasus I.M2
type of prop=radial engine
number of props=2
power main=555 hp
power alt=415 kW
max speed main=150 knots
max speed alt=172 mph, 275 km/h
max speed more=: 185 mph at 5,000 ft [http://www.britishaircraft.co.uk/aircraftpage.php?ID=651]
range main=1,250 mi
range alt= 2,010 km
ceiling main= 22,500 ft

ceiling alt=
climb rate main= 1,400 ft/min
climb rate alt=
loading main=
loading alt=
power/mass main=
power/mass alt=
armament=

ee also

aircontent

related=
Boulton Paul P.71A

similar aircraft=

sequence=

lists=

see also=

References

*cite book |last= |first= |authorlink= |coauthors= |title= The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985)|year= |publisher= Orbis Publishing|location= |issn=
*cite book |last= Jackson|first= A.J.|authorlink= |coauthors= |title= British Civil Aircraft since 1919|year= 1974|publisher= Putnam|location= London|isbn=0 370 10014 X

External links

* [http://www.britishaircraft.co.uk/aircraftpage.php?ID=651 British Aircraft Directory]