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In November 1932, the U.S. Army ordered the development of an [[amphibious aircraft|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 engine]]s mounted in individual nacelles above the wing, resembling an enlarged version of the [[Douglas Dolphin]].<ref name="Fran p192"/>
In November 1932, the U.S. Army ordered the development of an [[amphibious aircraft|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 engine]]s mounted in individual nacelles above the wing, resembling an enlarged version of the [[Douglas Dolphin]].<ref name="Fran p192"/>


Prior to completion, it was redesignated firstly as an observation aircraft '''YO-44''' and then as the '''YOA-5''' 'observation amphibian model 5'.<ref>Wagner, Ray, ''American Combat Planes'', 1981, Doubleday & Company, Garden City, New York, ISBN 9780385131209, page 307</ref> It first flew during January 1935, and was delivered to the army during February that year.<ref name="Fran p192">Francillon 1979, p.192.</ref> 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.<ref name="Fran p192-3">Francillon 1979, pp. 192—193.</ref>
Prior to completion, it was redesignated firstly as an observation aircraft '''YO-44''' and then as the '''YOA-5''' 'observation amphibian model 5'.<ref>Wagner, Ray, ''American Combat Planes'', 1981, Doubleday & Company, Garden City, New York, {{ISBN|9780385131209}}, page 307</ref> It first flew during January 1935, and was delivered to the army during February that year.<ref name="Fran p192">Francillon 1979, p.192.</ref> 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.<ref name="Fran p192-3">Francillon 1979, pp. 192—193.</ref>


==Operators==
==Operators==
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===Bibliography===
===Bibliography===
*Francillon, René. ''McDonnell Douglas Aircraft since 1920''. London:Putnam, 1979. ISBN 0-370-00050-1.
*Francillon, René. ''McDonnell Douglas Aircraft since 1920''. London:Putnam, 1979. {{ISBN|0-370-00050-1}}.


==External links==
==External links==

Revision as of 01:18, 7 June 2017

YOA-5
Role Seaplane bomber
Manufacturer Douglas Aircraft Company
First flight 1935
Introduction 1935
Retired 1943
Status Prototype
Primary user United States Army Air Corps
Number built 1
Developed from Douglas XP3D

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 completion, it was redesignated firstly as an observation aircraft YO-44 and then as the YOA-5 'observation amphibian model 5'.[2] 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.[3]

Operators

 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 Performance Armament

See also

Related lists

References

Notes

  1. ^ a b Francillon 1979, p.192.
  2. ^ Wagner, Ray, American Combat Planes, 1981, Doubleday & Company, Garden City, New York, ISBN 9780385131209, page 307
  3. ^ Francillon 1979, pp. 192—193.

Bibliography

  • Francillon, René. McDonnell Douglas Aircraft since 1920. London:Putnam, 1979. ISBN 0-370-00050-1.

External links

Wikimedia Commons has media related to Douglas YB-11.
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