|Douglas T2D-1 of VP-1|
|Manufacturer||Douglas Aircraft Company|
|First flight||27 January 1927|
|Primary user||United States Navy|
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.
Development and design
In 1925, the United States Navy's Bureau of Aeronautics designed a twin-engined torpedo bomber aircraft, intended to have greater performance than contemporary single-engined aircraft. A single prototype was built by the Naval Aircraft Factory as the XTN-1, which was quickly followed by three identical aircraft built by Douglas, the T2D-1.
The XTN/T2D was a large two bay biplane, capable of easy conversion between floats and wheels, and carrying a crew of four.
The first three T2D-1's were delivered to the torpedo bomber squadron VT-2 on 25 May 1927, being used for successful trials aboard the aircraft carrier Langley. A further nine T2D-1's were ordered in 1927, these normally being operated as floatplanes, partly owing to criticism from the Army of the Navy operating large land-based bombers, and partly as its large size prevented Langley from embarking a full airwing.
A further 18 aircraft were ordered in June 1930 as patrol floatplanes, being designated P2D-1. These were operated by Patrol Squadron VP-3 in the Panama Canal Zone until they were replaced by Consolidated PBYs in 1937.
- Original prototype built by Naval Aircraft Factory. One built.
- Production aircraft, convertible torpedo bomber/patrol floatplane, powered by Wright R-1750 Cyclone. 12 built.
- Dedicated patrol floatplane. Fitted with twin tail for improved engine out performance and powered by two R-1820 Cyclones. 18 built.
Data from The Encyclopedia of World Aircraft 
- Crew: four
- Length: 42 ft (12.80 m)
- Wingspan: 57 ft (17.37 m)
- Height: 15 ft 11 in (4.85 m)
- Wing area: 886 ft² (82.31 m²)
- Empty weight: 6,011 lb (2,726 kg)
- Max. takeoff weight: 10,523 lb (4,773 kg)
- Powerplant: 2 × Wright R-1750 Cyclone 9-cylinder single row radial, 525 hp (391 kW) each
- Maximum speed: 109 kn (125 mph, 201 km/h)
- Range: 397 nmi (457 mi, 735 km)
- Service ceiling: 13,830 ft (4,215 m)
- Rate of climb: 1,000 ft/min (304.8 m/min)
- Wing loading: 12.2 lb/ft² (58.0 kg/m²)
- Power/mass: 0.10 hp/lb (0.16 kW/kg)
- 2 × .30 in (7.62 mm) M1919 Browning machine guns
- 1 ×1,618 lb (734 kg) torpedo or equivalent bombload
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