Auster AOP.9
The Auster AOP.9 was a British military air observation aircraft ("Air Observation Post") produced by Auster Aircraft Limited to replace the Auster AOP.6.
Design and development
The Auster AOP.9 was designed as a successor to the Auster AOP.6. Like its predecessor, it was a braced high-wing single engined monoplane with a fixed tailwheel undercarriage. Although having the same general appearance, the AOP.9 was a new design, with larger wing area and a more powerful engine. The wing and tail were metal-skinned, but the fuselage and ailerons were fabric-covered. The fin and rudder assembly were more angular in the new aircraft with a noticeable dorsal fillet. A combination of the more powerful 180 hp (134 kW) Blackburn Cirrus Bombardier engine, larger wings and large flaps gave it an improved take-off and landing performance compared with the AOP.6. It could operate from ploughed fields and muddy surfaces using low pressure tyres and strengthened undercarriage.
The cabin held three seats, pilot and passenger side-by-side and the observer behind, facing either forwards or rearwards. The aircraft was also designed to be convertible into a two-seat light transport with an interchangeable rear floor. In this configuration the observer sat alongside the pilot.
Auster AOP
Auster AOP may refer to:
Auster AOP.6
The Auster AOP.6 was a British military air observation aircraft produced by Auster Aircraft Limited to replace the numerous wartime Taylorcraft Auster aircraft then in-service.
History
The Auster AOP.6 (Auster Model K) was designed as a successor to the Taylorcraft Auster V, it had a strengthened fuselage, increased all-up weight and a 145 hp (108 kW) de Havilland Gipsy Major 7 engine. It had a different appearance to the wartime Austers due to the lengthened landing gear struts (due to the larger propeller), and external non-retractable aerofoil flaps.
An initial production run of 296 were completed for the Royal Air Force in 1949. A second batch was produced from 1952 with a total delivered of around 400. Some aircraft ordered by the Royal Air Force aircraft were diverted to the Belgian Air Force (22) and the Royal Hong Kong Auxiliary Air Force (2). New aircraft were delivered to Royal Canadian Air Force, South African Air Force, and the Arab Legion Air Force (Jordan).
A dual-control training version of the AOP.6 was produced, 77 serving as the Auster T.7 (Auster Model Q). In 1955 two T.7 aircraft were modified for use on the 1956 Commonwealth Trans-Antarctic Expedition, being designated Auster Antarctic (Auster Model C4). The aircraft had extra radio equipment, larger tail surfaces, the ability to be fitted with floats or skis as required and a bright yellow finish to increase visibility against the snow and ice.
Taylorcraft Auster
The Taylorcraft Auster was a British military liaison and observation aircraft produced by the Taylorcraft Aeroplanes (England) Limited company during the Second World War.
Design and development
The Auster was a twice removed development of an American Taylorcraft design of civilian aircraft, the Model A. The Model A had to be redesigned in Britain to meet more stringent Civil Aviation standards and was named the Taylorcraft Plus C. After the start of the Second World War, the company developed the model further as an Air Observation Post (AOP)—flown by officers of the Royal Artillery and used for directing artillery fire of British Army Royal Artillery units.
The Plus C was re-engined with the Blackburn Cirrus Minor I engine and re-designated the Taylorcraft Plus D. Most of the civil Plus Cs and Ds were impressed into Royal Air Force service, the Plus Cs were re-engined with the Cirrus Minor I and re-designated as Plus C2.
Podcasts:
