The Douglas YB-11 was a bomber aircraft designed for the United States Army Air Corps. Although a prototype was built, it did not enter production.

In the early 1930s, the U.S. Army ordered the development of an amphibious observation plane, designated the Douglas YO-44, based on the U.S. Navy's Douglas XP3D seaplane. When the Army accepted the YO-44, it was redesignated YOA-5, 'observation amphibian model 5'. A version of the YOA-5 was converted to bomber duty and dubbed the YB-11. It was the only amphibian to carry a bomber designation.

Specifications (YB-11)

General Characteristics

• Crew:
• 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: ft² ( m²)
• Empty: lb ( kg)
• Loaded: 20,000 lb (9,000 kg)
• Maximum takeoff: lb ( kg)
• 'Powerplant: 2×Wright R-1820-45 'Cyclone' readials of 800 hp (600 kW)

Performance

• Maximum speed: 169 mph (272 km/h)
• Range: miles ( km)
• Service ceiling: ft ( m)
• Rate of climb: ft/min ( m/min)
• Wing loading: lb/ft² ( kg/m²)
• Power/Mass: .080 hp/lb (.13 kW/kg)

Armament

• 3× .30-calibre machine guns

Links

• USAF Museum description of YB-11

Related Content

Designation sequence: XB-8 - Y1B-9 - B-10 - YB-11 - B-12 - XB-13 - XB-14 - XB-15

Related Lists List of military aircraft of the United States - List of bomber aircraft - List of seaplanes and flying boats