Douglas YOA-5: Difference between revisions
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{{short description|American seaplane bomber prototype}}
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The '''Douglas YOA-5''' was an [[
==Design and development==
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==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 {{cvt|930|hp}} [[Wright YR-1820-45 Cyclone]] engines for experimental long-range flying, then re-engined again with {{cvt|750|hp}} [[Wright R-1820-25 Cyclone]]s.
==Specifications (
{{Aircraft specs
|ref=McDonnell Douglas aircraft since 1920 : Volume I<ref name="Francillon">{{cite book |last1=Francillon |first1=René J. |title=McDonnell Douglas aircraft since 1920 : Volume I |date=1988 |publisher=Naval Institute Press |location=London |isbn=0870214284 |pages=184–193}}</ref>
|prime units?=imp
<!--
General characteristics
-->
|crew=4
|capacity=
|length ft=69
|length in=6
|length note=
|span ft=89
|span in=9
|span note=
|height ft=212
|height in=0
|height note=
|wing area sqft=
|wing area note=
|aspect ratio=<!-- sailplanes -->
|airfoil=
|empty weight lb=
|empty weight note=
|gross weight lb=20000
|gross weight note=
|max takeoff weight lb=
|max takeoff weight note=
|fuel capacity=
|more general=
<!--
Powerplant
-->
|eng1 number=2
|eng1 name=[[Wright R-1820-25 Cyclone]]
|eng1 type=9-cylinder air-cooled radial piston engines
|eng1 hp=750
|prop blade number=<!-- propeller aircraft -->
|prop name=
|prop dia ft=<!-- propeller aircraft -->
|prop dia in=<!-- propeller aircraft -->
|prop dia note=
<!--
Performance
-->
|max speed mph=169
|max speed note=at sea level
|cruise speed mph=
|cruise speed note=
|stall speed mph=
|stall speed note=
|never exceed speed mph=
|never exceed speed note=
|minimum control speed mph=
|minimum control speed note=
|range miles=
|range note=
|combat range miles=
|combat range note=
|ferry range miles=
|ferry range note=
|endurance=<!-- if range unknown -->
|ceiling ft=
|ceiling note=
|g limits=<!-- aerobatic -->
|roll rate=<!-- aerobatic -->
|climb rate ftmin=
|climb rate note=
|time to altitude=
|wing loading lb/sqft=
|wing loading note=
|fuel consumption lb/mi=
|power/mass={{cvt|0.075|hp/lb|kW/kg}}
|more performance=
<!--
Armament
-->
|guns=3× .30 in (7.62 mm) [[M1919 Browning machine gun|machine gun]]s in open bow and fuselage positions
|avionics=
}}
==See also==
{{aircontent
|lists=
* [[List of bomber aircraft]]
* [[List of military aircraft of the United States]]
* [[List of
|see also=
}}
==References==
{{Reflist}}
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{{USAF bomber aircraft}}
{{USAAF observation aircraft}}
{{USAF amphibious aircraft}}
[[Category:Douglas aircraft|OA-5]]
[[Category:1930s United States bomber aircraft
[[Category:High-wing aircraft]]
[[Category:Amphibious aircraft]]
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Latest revision as of 14:33, 29 April 2024
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, based on the Navy's Douglas 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 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.[2]
Prior to completion, it was redesignated firstly as an observation aircraft YO-44 and then as the YOA-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 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)[edit]
Data from McDonnell 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 Cyclone 9-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 guns in 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 from the original on 26 Aug 2007.
- ^ a b Francillon 1979, p.192.
- ^ Wagner, Ray, American Combat Planes, 1981, Doubleday & Company, Garden City, New York, ISBN 9780385131209, 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. ISBN 0870214284.
Bibliography[edit]
- Francillon, René. McDonnell Douglas Aircraft since 1920. London:Putnam, 1979. ISBN 0-370-00050-1.