Avro 631 / 643 Cadet

Specifications

1st Flight 1931

Crew: 2

Length: 24 ft 9 in (7.54 m)

Wingspan: 30 ft 2 in (9.19 m)

Height: 8 ft 10 in (2.69 m)

Empty weight: 1,286 lb (583 kg)

Gross weight: 2,000 lb (907 kg)

Powerplant: 1 × Armstrong Siddeley Genet Major 1A 5-cylinder air-cooled radial piston engine, 150 hp (110 kW)

Propellers: 2-bladed fixed-pitch propeller

Performance

Maximum speed: 116 mph (187 km/h, 101 kn)

Cruise speed: 100 mph (160 km/h, 87 kn)

Range: 325 mi (523 km, 282 nmi)

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

Rate of climb: 700 ft/min (3.6 m/s)

Wing loading: 7.63 lb/sq ft (37.3 kg/m2)

Power/mass: 0.075 hp/lb (0.123 kW/kg)

Variants

The Avro Cadet was a single-engined British biplane trainer designed and built by Avro in the 1930s as a smaller development of the Avro Tutor for civil use.

The Avro 631 Cadet was developed in 1931 as a smaller, more economical, derivative of the Tutor military trainer, for flying club or personal use. The first prototype, G-ABRS flew in October 1931. 

It was publicly unveiled at the opening of Skegness airfield in May 1932, although by this time, the first orders for the type, for the Irish Army Air Corps, had already been placed and the order (for six Cadets) delivered.

The Avro 643 Cadet was a single-engined British biplane trainer designed and built by Avro in the 1930s as a smaller development of the Avro Tutor for civil use.

Avro 631 Cadet – Initial version, powered by Armstrong Siddeley Genet Major I engine, 35 built.

Avro 643 Cadet – Raised rear seat, eight built.

Avro 643 Cadet II – Powered by 150 hp (110 kW) Genet Major 1A, 61 built.

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