Avro International Aerospace.
AVRO 621 Tutor
Introduction date 1933
First flight September 1929
Number built 606
Avro Int. Aerospace
AVRO 621 Tutor
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| General information | |
|---|---|
| Type | Trainer |
| National origin | United Kingdom |
| Manufacturer | Avro |
| Designer | Roy Chadwick |
| Primary user | Royal Air Force |
| Number built | 606 |
| History | |
| Introduction date | 1933 |
| First flight | September 1929 |
| Retired | 1941 |
| Variants | Avro 626, PWS-18 |
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History Avro International Aerospace
AVRO 621 Biplane "Tutor" Trainer
Introduction date 1933
First flight September 1929
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 tailskid was used in all but the latest aircraft, which had a tailwheel.
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
Design and development
The Avro Type 621 Tutor is a two-seat British radial-engined biplane from the interwar period. It was a simple but rugged basic trainer that was used by the Royal Air Force as well as many other air arms worldwide...
Operational history
Production was started against an order for three Tutors 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 first batch of 21 Trainers, a total of 381 Tutors and 15 Avro 646 Sea Tutors were eventually ordered by the RAF. RAF units to operate the type in quantity included the Royal Air Force College, the Central Flying School and Nos. 2, 3, 4 and 5 Flying Training Schools.
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 Guangxi 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.
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Avro International Aerospace
AVRO 621 Tutor
Number built 606
Introduction date 1933
First flight September 1929
Avro Int. Aerospace
AVRO 621 Tutor Biplane
First flight Sep 1929, Introduction date 1933
General Info
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- Crew: 2
- Length: 26 ft 4.5 in (8.039 m)
- Wingspan: 34 ft 0 in (10.36 m)
- Height: 9 ft 7 in (2.92 m)
- Wing area: 301 sq ft (28.0 m2)
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Powerplant
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- Empty weight: 1,844 lb (836 kg)
- Gross weight: 2,493 lb (1,131 kg)
- Powerplant: 1 × Armstrong Siddeley Lynx IVC 7-cylinder air-cooled radial piston engine, 240 hp (180 kW)
- Propellers: 2-bladed fixed-pitch propeller
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Performance
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- Maximum speed: 120 mph (190 km/h, 100 kn)
- Cruise speed: (156 km/h, 84 kn)
- Range: (400 km, 220 nmi)
- Service ceiling: (4,900 m)
- Rate of climb: (4.6 m/s)
Links to Youtube & Others
The Avro 504J and 504K were the primary training aircraft used during the First World War, built in greater numbers than any other British aircraft of the period.
Avro Int.
Avro 621 Tutor
Engine choices for the 504K included the 100 hp Gnome Monosoupape, the 80 or 110 hp Le Rhone, and the 130 hp Clerget, amongst others.
Youtube Link
From mid-1915 onward, the Avro 504 was withdrawn from operations in France and it became the standard training aircraft for the Royal Flying Corps.
Read more in Avro (an initialism of the founder's name) was a British aircraft manufacturer.
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