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Short Shirl
The Short N.1B Shirl was a British single seat biplane intended to carry heavy torpedoes from early aircraft carriers late in World War I. It met its specifications but planned production was ended with the Armistice of 1918. The design was developed further for an attempt to cross the Atlantic non-stop for the first time, but this was not successful. ==Development== The first ship-borne torpedo bomber, the Sopwith Cuckoo had been well received but was unable to carry the Royal Navy's 1,423 lb (645 kg) Mark VIII torpedo that was required to destroy the largest warships. The Admiralty issued a Specification (N.1B) in late 1917 for an aircraft that could carry this torpedo, and Short Brothers and Blackburn submitted proposals, Short's with the Shirl and Blackburn with the Blackburd. Both manufacturers were asked to provide three prototypes using the 385 hp (290 kW) Rolls-Royce Eagle VIII water-cooled engine.〔 The Shirl was a two bay biplane with foldable fabric covered wings without stagger and of equal span carrying two pairs of ailerons. The fuselage was rectangular in cross-section and plywood covered in anticipation of ditching at the end of the mission, since deck landing was not yet practicable. The split axle undercarriage could be jettisoned for the same situation. The engine was cooled with a honeycomb radiator immediately behind a two-blade propeller.
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