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Avro Tutor Aircraft Information

Avro Tutor

Avro 621 Tutor

Warbird Picture - Avro Type 621 Tutor of the Shuttleworth Collection

Picture - Avro Type 621 Tutor of the Shuttleworth Collection

Role: Trainer
Manufacturer: Avro
Designed by: Roy Chadwick
First flight: 1930
Introduced: 1933
Retired: 1941
Primary user: Royal Air Force
Number built: 606
Variants: Avro 626, PWS-18

A.V. Roe's Type 621 Tutor was a two-seat British radial engined biplane from the interwar period. It was a simple but rugged initial trainer that was used by the Royal Air Force as well as many other air arms worldwide.

Design and development

The Avro Model 621 was designed by Roy Chadwick as an Avro private venture metal replacement for the Avro 504. Conceived as a light initial pilot trainer, the biplane design featured heavily staggered equal span, single-bay wings; the construction was based on steel tubing (with some wooden components in the wing ribs) with doped linen covering. A conventional, fixed divided main undercarriage with tail skid was used in all but the latest aircraft, which had a tail wheel.

The Model 621 was powered either by a 155 hp (116 kW) Armstrong Siddeley Mongoose or Armstrong Siddeley Lynx IV (180 hp/130 kW) or IVC (240 hp/179 kW) engine; later Lynx-powered models had the engine enclosed in a Townend ring cowling. The Mongoose powered version was called the 621 Trainer and the more numerous Lynx engined aircraft the Tutor. The Tutor also differed by having a more rounded rudder.

The first flight of the prototype G-AAKT was either late in 1929 or early in 1930.

Operational history

Production was started against an order for three from the Irish Free State and 21 Trainers from the Royal Air Force. The RAF required a replacement for the wooden Avro 504, and after three years of trials against other machines such as the Hawker Tomtit it was adopted as their basic trainer, supplanting the 504 in 1933 and remaining in this role until 1939. As well as the 21 Trainers a total of 381 Tutors and 15 Avro 646 Sea Tutors were eventually ordered by the RAF. Subsequently, the Model 621 achieved substantial foreign sales. A.V. Roe and Co exported 29 for the Greek Air Force, six for the Royal Canadian Air Force, five for the Kwangsi AF, three for the Irish AF (where it was known as the Triton) and two for each of the South African and Polish AFs. In addition 57 were licence built in South Africa, and three licence built by the Danish Naval Shipyard.

A total of 30 Tutors were exported to the Greek Air Force and at least 61 were licence built in Greece by KEA. A number of Greek Tutors was incorporated in combat squadrons after Greece's entrance in WWII, used as army co-operation aircraft.

Known for its good handling, the type was often featured at air shows. Over 200 Avro Tutors and five Sea Tutors remained in RAF service at the beginning of the Second World War.

The 621 was designed as a military trainer and few reached the civil registers. In the 1930s, in addition to 10 prototypes and demonstrators, two were used by Alan Cobham's Flying Circus and two trainers were retired from the RAF into private use. One 621 was used from new by Australian National Airways. After the war another four ex-RAF 621s appeared on the civil register.

Airplane Picture - Avro Tutor 621 of the Shuttleworth Collection

Picture - Avro Tutor 621 of the Shuttleworth Collection

Variants

Avro 621 Trainer (Mongoose powered) Two-seat primary training aircraft. Avro 621 Tutor (Lynx powered) Two-seat primary training aircraft. Avro 621 Tutor II One aircraft was modified into a two bay biplane. Avro 621 survey version Three built and served in what was the Tanganyika. Avro 646 Sea Tutor Two-seat seaplane fitted with twin floats, 15 built

Operators

Czechoslovakia

Czechoslovak Air Force pilots operated at least one aircraft in 310 Fighter Squadron RAF.

Denmark

Danish Air Force operated five aircraft.

Canada

Royal Canadian Air Force operated six aircraft..

China

Chinese Nationalist Air Force (Kwangsi Airforce ) operated five aircraft.

Iraq

Iraqi Air Force operated three aircraft.

Ireland

Irish Air Corps operated three aircraft.

Greece

Hellenic Air Force operated about 90 aircraft.

Poland

Polish Air Force received two aircraft.

South Africa

South African Air Force operated 60 aircraft.

United Kingdom

Royal Air Force received 417 aircraft.

Survivors

Airplane Picture - The Shuttleworth Collection's Avro TutorK3215/G-AHSA

Picture - The Shuttleworth Collection's Avro TutorK3215/G-AHSA

G-AHSA was used for communication duties during the Second World War, struck off December 1946 and purchased by Wing Commander Heywood. After suffering engine failure in the early stages of the filming of Reach for the Sky, it was purchased by the Shuttleworth Collection and restored to flying condition.

Up to the end of 2003, G-AHSA was still flying as K3215 in RAF trainer yellow. Since January 2004 it has flown painted as K3241 in the colours of the Central Flying School. (The real K3241 built in 1933, served RAF College Cranwell, until transferred to the CFA in 1936.)

Specifications (Tutor)

Data from Avro Aircraft since 1908

General characteristics

Crew: Two (student & instructor)
Length: 26 ft 4 in (8.04 m)
Wingspan: 34 ft 0 in (10.36 m)
Height: 9 ft 7 in (2.92 m)
Wing area: 301 ft (27.96 m)
Empty weight: 1,844 lb (836 kg)
Loaded weight: 2,493 lb (1,131 kg)
Powerplant: 1x Armstrong Siddeley Lynx IVC, 240 hp (180 kW)

Performance

Maximum speed: 104 kn (120 mph, 193 km/h)
Cruise speed: 84 kn (97 mph, 156 km/h)
Range: 250 mi (402 km)
Service ceiling: 16,000 ft (4,877 m)
Rate of climb: 910 ft/s (4.6 m/s)

Related development

Avro 626
Avro Prefect
Avro Cadet
Avro 637
PWS-18

Comparable aircraft

Hawker Tomtit
PWS-26
de Havilland Tiger Moth

Bibliography

Jackson, A.J. Avro Aircraft since 1908, 2nd edition. London: Putnam Aeronautical Books, 1990. ISBN 0-85177-834-8.
Thetford. O. Aircraft of the Royal Air Force 1918-57. London: Putnam, 1957.
Vančata, Pavel. "Cechoslovxci v zahraničnxm odboji". Revi (bi-monthly magazine) #65. Ostrava-Poruba: REVI Publications, 2006. ISSN 1211-0744 (Czech language).

Avro Tutor Pictures and Avro Tutor for Sale.

Living Warbirds: The best warbirds DVD series.

Source: WikiPedia

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