The Boulton-Paul Defiant

Designer : J.D North
Boulton Paul ( Wolverhampton )

Description : Two Seat Fighter
Type : Low Wing Monoplane


Wingspan : 39ft 4 inches ( 11.99 m )
Length : 35 ft 4 inches ( 10.77 m )
Height : 11ft 4inches ( 3.45 m )
Wing Area : 250 sq feet ( 23.22 m sq )


Power Plant Mk 1 : Rolls Royce Merlin III V12 liquid cooled piston engine
Power Plant Mk 2 : Rolls Royce Merlin XX V12 liquid cooled piston engine
B.H.P. Mk 1 : 1030 bhp at 16,250 ft ( 4955 m )
B.H.P. Mk 2: 1260 bhp at 12,250 ft ( 3735 m )
Armament : 4 Browning 0.303 machine guns Mounted in a power operated turret.
Weight empty : 6078 lb ( 2758 kg )
Weight Loaded (normal) : 8424 lb ( 3822 kg )
Performance
Max Speed Mk 1 : 304 mph ( 490 kph ) at 17,000 ft ( 5180 m )
Max Speed Mk 2 : 313 mph ( 505 kph ) at 19,000 ft ( 5790 m )
Service Ceiling : 36,000 ft ( 10,950 m )
Range : 425 miles ( 684 km ) 



First Flight : 11 August 1937 ( prototype )
Mk 1 on the 30th July 1939
Mk 2 on the 20 July 1940
Service Entry Mk 1 : May 1940

Squadrons allocated the Defiant during the Battle.


No 141 Squadron
No 264 Squadron

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