Douglas YOA-5

Last updated
YOA-5
Parked Douglas YB-11.jpg
Role Seaplane bomber
Manufacturer Douglas Aircraft Company
First flight1935
Introduction1935
Retired1943
StatusPrototype
Primary user United States Army Air Corps
Number built1
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.

Contents

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

Flag of the United States (1912-1959).svg  United States

Variants

YB-11
An amphibious reconnaissance bomber ordered in 1932 by the US Army Air Corps, powered by 2x Wright R-1820-13 Cyclone radial engines.
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. The YOA-5 started life with Wright R-1820-13 Cyclone engines, was re-engined with 930 hp (690 kW) Wright YR-1820-45 Cyclone engines for experimental long-range flying, then re-engined again with 750 hp (560 kW) Wright R-1820-25 Cyclones.

Specifications (YOA-5)

Data from McDonnell Douglas aircraft since 1920 : Volume I [4]

General characteristics

Performance

Armament

See also

Related lists

Related Research Articles

Martin B-10 American bomber aircraft

The Martin B-10 was the first all-metal monoplane bomber to be regularly used by the United States Army Air Corps, entering service in June 1934. It was also the first mass-produced bomber whose performance was superior to that of the Army's pursuit aircraft of the time.

Curtiss Falcon American multirole aircraft

The Curtiss Falcon was a family of military biplane aircraft built by the American aircraft manufacturer Curtiss Aeroplane and Motor Company during the 1920s. Most saw service as part of the United States Army Air Corps as observation aircraft with the designations O-1 and O-11, or as the attack aircraft designated the A-3 Falcon.

Douglas DC-5 Twin-engine propeller aircraft intended for shorter routes

The Douglas DC-5 was a 16-to-22-seat, twin-engine propeller aircraft intended for shorter routes than the Douglas DC-3 or Douglas DC-4. By the time it entered commercial service in 1940, many airlines were canceling orders for aircraft. Consequently, only five civilian DC-5s were built. With the Douglas Aircraft Company already converting to World War II military production, the DC-5 was soon overtaken by world events, although a limited number of military variants were produced.

Keystone B-5

The Keystone B-5 is a light bomber made by the Keystone Aircraft company for the United States Army Air Corps in the early 1930s. The B-5A was a Keystone B-3A with Wright Cyclone rather than Pratt & Whitney engines.

Keystone B-6 Biplane bomber of the United States Army Air Corps

The Keystone B-6 was a biplane bomber developed by the Keystone Aircraft company for the United States Army Air Corps.

Douglas Y1B-7 American bomber/observation aircraft

The Douglas Y1B-7 was a 1930s American bomber aircraft. It was the first US monoplane given the B- 'bomber' designation. The monoplane was more practical and less expensive than the biplane, and the United States Army Air Corps chose to experiment with monoplanes for this reason. At the time the XB-7 was ordered, it was being tested by Douglas Aircraft as an observational plane.

Douglas B-23 Dragon American medium bomber aircraft

The Douglas B-23 Dragon is an American twin-engined bomber developed by the Douglas Aircraft Company as a successor to the B-18 Bolo.

Douglas Dolphin

The Douglas Dolphin was an American amphibious flying boat. While only 58 were built, they served a wide variety of roles including private air yacht, airliner, military transport, and search and rescue.

Curtiss SBC Helldiver US navy biplane

The Curtiss SBC Helldiver was a two-seat scout bomber and dive bomber built by the Curtiss-Wright Corporation. It was the last military biplane procured by the United States Navy. Delivered in 1937, it became obsolete even before World War II and was kept well away from combat with Axis fighters.

Douglas O-46 US military observation aircraft in service 1936-1942

The Douglas O-46 was an observation aircraft used by the United States Army Air Corps and the Philippine Army Air Corps.

Northrop A-17 American attack aircraft

The Northrop A-17, a development of the Northrop Gamma 2F model, was a two-seat, single-engine, monoplane, attack bomber built in 1935 by the Northrop Corporation for the U.S. Army Air Corps. When in British Commonwealth service during World War II, the A-17 was called Nomad.

Northrop Gamma Multi-role aircraft family by Northrop

The Northrop Gamma was a single-engine all-metal monoplane cargo aircraft used in the 1930s. Towards the end of its service life, it was developed into the A-17 light bomber.

Douglas T2D

The Douglas T2D was an American twin-engined torpedo bomber contracted by the military, and required to be usable on wheels or floats, and operating from aircraft carriers. It was the first twin-engined aircraft to be operated from an aircraft carrier.

Douglas O-2

The Douglas O-2 was a 1920s American observation aircraft built by the Douglas Aircraft Company.

Keystone LB-6 1927 bomber aircraft family by Keystone

The Keystone LB-6 and LB-7 were 1920s American light bombers, built by the Keystone Aircraft company for the United States Army Air Corps, called Panther by the company, but adoption of the name was rejected by the U.S. Army.

Northrop Delta

The Northrop Delta was an American single-engined passenger transport aircraft of the 1930s. Closely related to Northrop's Gamma mail plane, 13 were produced by the Northrop Corporation, followed by 19 aircraft built under license by Canadian Vickers Limited.

Douglas XP3D

The Douglas XP3D was a prototype American patrol flying boat of the 1930s. A twin-engined high-winged monoplane, the P3D was produced by the Douglas Aircraft Company to equip the US Navy's Patrol squadrons, but despite meeting the Navy's requirements, the rival Consolidated PBY was preferred owing to a lower price.

Curtiss O-40 Raven

The Curtiss O-40 Raven was an American observation aircraft of the 1930s which was built and used in small numbers. A single example of the YO-40, a single-engined Sesquiplane with a retractable undercarriage was built, followed by four examples of a modified monoplane version, the O-40B, which remained in use until 1939.

Douglas DC-2 Two engined airliner

The Douglas DC-2 is a 14-passenger, twin-engined airliner that was produced by the American company Douglas Aircraft Company starting in 1934. It competed with the Boeing 247. In 1935, Douglas produced a larger version called the DC-3, which became one of the most successful aircraft in history.

Douglas R4D-8 Military transport aircraft

The Douglas R4D-8 is a military transport aircraft developed from the civilian Douglas DC-3S airliner. It was used by the United States Navy and United States Marine Corps during the Korean War and Vietnam War.

References

  1. 1 2 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.
  4. Francillon, René J. (1988). McDonnell Douglas aircraft since 1920 : Volume I. London: Naval Institute Press. pp. 184–193. ISBN   0870214284.

Bibliography