Martinsyde F.4 Buzzard

The Martinsyde F.4 Buzzard was developed as a powerful and fast biplane fighter for the Royal Air Force, but the end of the First World War led to the abandonment of large-scale production.

Fewer than 400 were eventually produced, with many exported.

Of particular note was the Buzzard’s high speed, being one of the fastest aircraft developed during World War I.



Single-seat fighter biplane.

Powered by Rolls-Royce Falcon.

Seven built.

F.4 Buzzard

Single-seat fighter biplane.

Powered by 300 hp (220 kW) Hispano-Suiza 8 engine.

Main production type.

F.4 Buzzard 1a

Long range escort fighter for Independent Air Force; three built.


Surplus F.4 Buzzards converted into two-seat touring aircraft.

Type A.Mk I

Surplus F.4 Buzzards converted into two-seat long-range aircraft.

Larger two-bay wings, powered by Rolls-Royce Falcon engines.

Type AS.Mk I

This version of the Type A.Mk I was fitted with float landing gear.

Type A.Mk II

Four-passenger cabin version of A Mk.I.

Powered by Hispano-Suiza or Falcon engine.


Surplus F.4 Buzzards converted into two-seat aircraft; revised wing and landing gear.

A.D.C. 1

Single-seat fighter version, powered by a 395 hp (295 kW) Armstrong Siddeley Jaguar radial piston engine.

The aircraft was developed by the Aircraft Disposal Company.

One prototype, Eight production aircraft were exported to Latvia.

Nimbus Martinsyde

One aircraft was converted by A.D.C., and fitted with a 300 hp (220 kW) ADC Nimbus engine.

A.V. 1

One aircraft built for the engine designer Amherst Villiers.


A single A.Mk 1 modified for a transatlantic flight attempt, powered by a 285 hp (213 kW) Rolls-Royce Falcon III.





25 ft 5.6 in (7.76 m)


32 ft 9.4 in (9.99 m)


8 ft 10 in (2.69 m)

Wing area

320 sq ft (29.7 m2)

Empty weight

1,811 lb (823 kg)

Gross weight

2,398 lb (1,090 kg)


1 × Hispano-Suiza 8Fb inline engine, 300 hp (224 kW)


Maximum speed

146 mph (235 km/h, 127 kn) at sea level 132.5 mph (115 knots, 213 km/h) at 15,000 ft (4,600 m)


2.5 hours

Service ceiling

24,000 ft (7,320 m)

Climb to 10,000 ft (3,050 m)

7 min 55 sec



2x 0.303 in (7.7 mm) Vickers machine guns.





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