Miles Whitney Straight

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M.11 Whitney Straight
WhitneyStraight2576.jpg
M.11A Whitney Straight (G-AEZO), after finishing 2nd in the King's Cup Air Race at Hatfield, 11 September 1937
Role sporting monoplane
Manufacturer Miles Aircraft
Designer Frederick George Miles
First flight 14 May 1936
Produced 1936-1937
Number built 50

The Miles M.11 Whitney Straight was a 1930s British two-seat cabin monoplane with dual-controls.

Design and development[edit]

The M.11 Whitney Straight was designed by F.G. Miles of Philips and Powis as the result of collaboration with Whitney Straight, a Grand Prix motor racing driver, aviator and businessman. The aim was to provide comfortable accommodation for pilot, passenger and luggage in an enclosed 'side-by-side' cockpit. It was a low-wing monoplane, with fixed main undercarriage in aerodynamic fairings plus a fixed tailwheel. Construction was mainly of wood, with spruce frames and three-ply birch covering, and the wings had vacuum-operated split flaps. It was initially powered by a 130 hp (97 kW) de Havilland Gipsy Major I piston engine. The sole M.11B was powered by a 135 hp (101 kW) Amherst Villiers Maya I engine, adding 10 mph (16 km/h) to its maximum speed and 200 ft/min (60 m/min) to its rate of climb. A single M.11C was powered by a 145 hp (108 kW) de Havilland Gipsy Major II engine and variable-pitch propeller.[1][2]

Miles M.11A Whitney Straight G-AERV (6738299133).jpg
Mile Whitney Straight Old Warden 6 Oct 2013 -1.jpg

Operational history[edit]

On 14 May 1936, the prototype (G-AECT), built by Philips and Powis (Miles Aircraft), first flew at Woodley Aerodrome, piloted by F.G. Miles. When production ended in 1937, 50 Whitney Straights had been built.[1][2]

On 28 June 1938, the M.11C (G-AEYI) crashed at Harefield, Berkshire, killing the test pilot, Wing Commander F.W. Stent. Modified Whitney Straights were also used as engine test beds and by Miles to test different flap designs. After the outbreak of World War II in 1939, the Air Ministry impressed 23 Whitney Straights into military service, for use as communications aircraft. Twenty-one of those served in the UK, one in India, and one in Egypt. One M.11A also served with the Fleet Air Arm from 1940 to 1943, and three with the Royal New Zealand Air Force.[1][2]

Between 1939 and 1943, a New Zealand machine piloted by Alan Pritchard was used for aerial seed sowing trials at Ninety Mile Beach and later spreading superphosphate. These trials were part of the experiments which lead to the development of aerial topdressing, (see also Agricultural aircraft).

Operators[edit]

 New Zealand
 United Kingdom

Survivors[edit]

Specifications (M.11A)[edit]

Data from Jackson 1988[2]

General characteristics

  • Crew: two
  • Length: 25 ft 0 in (7.62 m)
  • Wingspan: 35 ft 8 in (10.87 m)
  • Height: 6 ft 6 in (1.98 m)
  • Wing area: 178 ft² (16.5 m²)
  • Empty weight: 1,250 lb (568 kg)
  • Loaded weight: 2,000 lb (909 kg)
  • Powerplant: 1 × de Havilland Gipsy Major I air-cooled, 4-cylinder inline engine, 130 hp (97 kW)

Performance

See also[edit]

Related development
Related lists

Notes[edit]

  1. ^ a b c Brown 1970, pp. 121-128
  2. ^ a b c d Jackson 1988, pp. 62-65

Bibliography[edit]

  • Brown, Don Lambert. Miles Aircraft Since 1925. Putnam, 1970. ISBN 0-370-00127-3.
  • Jackson, A.J. British Civil Aircraft 1919–1972: Volume III. Putnam, 1988. ISBN 0-85177-818-6.
  • Mondey, David. The Hamlyn Concise Guide to British Aircraft of World War II. Chancellor Press, 2002. ISBN 1-85152-668-4.