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AD Seaplane Type 1000
The AD Seaplane Type 1000 also known as the Admiralty Type 1000 and the AD.1 (from Air Department) was a British seaplane of the First World War designed to attack German warships. When it first flew, it was the largest British aircraft yet to take to the air.
==Development==
The design of the AD.1 was by Harris Booth of the Admiralty's Air Department just prior to World War I. It was the world's first aircraft designed from scratch as a torpedo bomber, one of the three planned versions of the design. The other two were a bomber and an aircraft armed with a recoilless Davis 12-pounder gun (approximately 76 mm calibre).
The aircraft was a float-equipped biplane of pod-and-boom design, with engines mounted at the front of both booms, as well as at the rear of the crew pod. Development began in 1915; it was completed and flown for the first time during the summer of 1916. It was found that the Davis gun would project a blast rearwards so the weapon was changed for a conventional 12-pounder "Naval Landing Gun" though in practice a gun was never installed in the AD.1.
Initially the plane was to use Sunbeam Nubian engines, but this was delayed and Hispano-Suiza selected instead, though eventually the Sunbeam Nubian IIs of 150 hp were delivered in 1917.〔http://www.localhistory.scit.wlv.ac.uk/Museum/Transport/planes/SunbeamEngines4.htm Accessed 29 January 2007〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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