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Douglas YOA-5

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YOA-5
Role

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Manufacturer

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First flight

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Introduction

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Retired

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Status

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Primary user

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Number built

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Developed from

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The Douglas YOA-5 was an Amphibious aircraft designed for the United States Army Air Corps. Although a prototype was built, it did not enter production.

Design and development

In November 1932, the U.S. Army ordered the development of an amphibious reconnaissance aircraft/bomber, intended to act as navigation leaders and rescue aircraft for formations of conventional bombers. The resultant aircraft, which was ordered under the bomber designation YB-11, was designed in parallel with the similar but larger Douglas XP3D patrol flying boat for the United States Navy. It was a high-winged monoplane with two Wright R-1820 Cyclone radial engines mounted in individual nacelles above the wing, resembling an enlarged version of the Douglas Dolphin.[1]

Prior to it being completed, it was first redesignated as an observation aircraft YO-44 and then as the YOA-5 'observation amphibian model 5'. It first flew during January 1935, and was delivered to the army during February that year.[1] The concept for which it was designed proved impracticable, and no further production ensued, but the YOA-5 was used to set two world distance records for amphibians, being finally scrapped in December 1943.[2]

Operators

23x15px United States

Variants

YB-11
An amphibious reconnaissance bomber ordered in 1932 by the US Army Air Corps.
YO-44

The YB-11 redesignated in the Observation category before completion.

YOA-5
Another redesignation to the Observation Amphibian category. One built, given the aforementioned designations at various times in its life.

Specifications (YB-11)

General characteristics

  • Length: 69 ft 9 in (21.3 m)
  • Wingspan: 89 ft 9 in (27.4 m)
  • Height: 22 ft 0 in (6.7 m)
  • Wing area: 1,101 ft² (102.3 m²)
  • Empty weight: 14,038 lb (6,368 kg)
  • Loaded weight: 20,000 lb (9,000 kg)
  • Powerplant: 2 × Wright R-1820-45 Cyclone air-cooled radial piston engines, 800 hp (600 kW) each

Performance

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See also

Related lists

References

Notes
  1. ^ a b Francillon 1979, p.192.
  2. ^ Francillon 1979, pp. 192—193.
Bibliography
  • Francillon, René. McDonnell Douglas Aircraft since 1920. London:Putnam, 1979. ISBN 0-370-00050-1.

External links