<!-- This article is a part of WikiProject Aircraft
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's Type 621 Tutor
was a two-seat British
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 in September 1929, piloted by Avro chief... Read More