Douglas YOA-5
| YOA-5 | |
|---|---|
| |
| Role | Seaplanebomber |
| 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 |
TheDouglas YOA-5was anamphibious aircraftdesigned for theUnited States Army Air Corps,based on the Navy'sDouglas XP3D.[1]Although a prototype was built, it did not enter production.
Design and development[edit]
In November 1932, the U.S. Army ordered the development of anamphibiousreconnaissance 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 designationYB-11,was designed in parallel with the similar but largerDouglas XP3Dpatrolflying boatfor theUnited States Navy.It was a high-wingedmonoplanewith twoWright R-1820 Cycloneradial enginesmounted in individual nacelles above the wing, resembling an enlarged version of theDouglas Dolphin.[2]
Prior to completion, it was redesignated firstly as an observation aircraftYO-44and then as theYOA-5'observation amphibian model 5'.[3]It first flew during January 1935, and was delivered to the army during February that year.[2]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.[4]
Operators[edit]
Variants[edit]
- YB-11
- An amphibious reconnaissance bomber ordered in 1932 by the US Army Air Corps, powered by 2xWright R-1820-13 Cycloneradial 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 withWright R-1820-13 Cycloneengines, was re-engined with 930 hp (690 kW)Wright YR-1820-45 Cycloneengines for experimental long-range flying, then re-engined again with 750 hp (560 kW)Wright R-1820-25 Cyclones.
Specifications (YOA-5)[edit]
Data fromMcDonnell Douglas aircraft since 1920: Volume I[5]
General characteristics
- Crew:4
- Length:69 ft 6 in (21.18 m)
- Wingspan:89 ft 9 in (27.36 m)
- Height:212 ft 0 in (64.62 m)
- Gross weight:20,000 lb (9,072 kg)
- Powerplant:2 ×Wright R-1820-25 Cyclone9-cylinder air-cooled radial piston engines, 750 hp (560 kW) each
Performance
- Maximum speed:169 mph (272 km/h, 147 kn) at sea level
- Power/mass:0.075 hp/lb (0.123 kW/kg)
Armament
- Guns:3×.30 in (7.62 mm)machine gunsin open bow and fuselage positions
See also[edit]
Related lists
- List of bomber aircraft
- List of military aircraft of the United States
- List of flying boats and floatplanes
References[edit]
- ^"Fact Sheets: Douglas YB-11".National Museum of the United States Air Force™.Archived fromthe originalon 26 Aug 2007.
- ^abFrancillon 1979, p.192.
- ^Wagner, Ray,American Combat Planes,1981, Doubleday & Company, Garden City, New York,ISBN9780385131209,page 307
- ^Francillon 1979, pp. 192–193.
- ^Francillon, René J. (1988).McDonnell Douglas aircraft since 1920: Volume I.London: Naval Institute Press. pp. 184–193.ISBN0870214284.
Bibliography[edit]
- Francillon, René.McDonnell Douglas Aircraft since 1920.London:Putnam, 1979.ISBN0-370-00050-1.
External links[edit]
