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R31-class airship
The ''R31'' class of British rigid airships was constructed in the closing months of World War I and comprised two aircraft, His Majesty's Airship ''R31'' and ''R32''. They were designed by the Royal Corps of Naval Constructors – with assistance from a Herr Müller who had defected to Britain and previously worked for the Schütte-Lanz airship company – and built by Short Brothers at the Cardington airship sheds. The airship frame was made from spruce plywood laminated into girder sections, weatherproofed with varnish, and also fireproofed. These enclosed 21 gas bags.〔Airship Heritage Trust R31〕 ''R31'' was the largest British airship to fly before the end of the war, and the class remains the largest mobile wooden structures ever built.
As the airships were intended for fleet protection operations, they were to be fitted with defensive machine guns on top of the envelope, at the stern and in the gondolas. A 12-pounder gun was to be fitted in a special position centrally below the airship for use against U-boats. In the event, this armament was only fitted to ''R31'', as ''R32'' was only completed after the armistice with Germany.〔Airship Heritage Trust R32〕 It had also been intended to fit a bomb load of two bombs and four bombs. but with the end of hostilities these were never installed on either airship.
==Operational history==
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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