Avro 555 Bison

Specifications

1st Flight 1921

Crew: 4

Length: 36 ft 0 in (10.97 m)

Wingspan: 46 ft 0 in (14.02 m)

Height: 14 ft 2 in (4.32 m)

Wing area: 630 sq ft (59 m2)

Empty weight: 4,116 lb (1,867 kg)

Max takeoff weight: 6,132 lb (2,781 kg)

Powerplant: 1 × Napier Lion II W-12 liquid-cooled piston engine, 480 hp (360 kW) at 2,200 rpm

normal 450 hp (336 kW) at 2,000 rpm

Propellers: 2-bladed fixed-pitch propeller

Performance

Maximum speed: 108 mph (174 km/h, 94 kn)

Cruise speed: 90 mph (140 km/h, 78 kn)

Range: 360 mi (580 km, 310 nmi)

Service ceiling: 12,000 ft (3,700 m)

Rate of climb: 450 ft/min (2.3 m/s)

Armament

Guns: 1 × fixed forward firing .303 in Vickers machine gun and 1 × .303 in (7.7 mm) Lewis Gun on Scarff ring

Bombs: Provision for underwing bomb racks

Variants

The Avro 555 Bison was a British single-engined fleet spotter/reconnaissance aircraft built by Avro.

Avro 555 Bison – Three prototypes to Air Ministry specification 3/21.

Avro 555 Bison I – Twelve Lion II powered production aircraft, survivors rebuilt as IAs

Avro 555 Bison IA – Bison Is modified with a biplane gap and additional dorsal fin.

Avro 555A Bison II – Improved variant with biplane gap modification, 23 built.

Avro 555B Bison I – One Bison I converted to an amphibian to meet Air Ministry Specification 8/23, not ordered into production.

Share on facebook

Share on facebook