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Armstrong Siddeley Jaguar : ウィキペディア英語版 | Armstrong Siddeley Jaguar
The Armstrong Siddeley Jaguar was an aero engine developed by Armstrong Siddeley. The Jaguar was a petrol-fuelled air-cooled 14-cylinder two-row radial engine design. The Jaguar III was first used in 1923, followed in 1925 by the Jaguar IV and in 1927 by the Jaguar VI. ==Design and development== The Jaguar was developed from the Royal Aircraft Factory RAF.8 design proposal of 1917, and was engineered to use a gear-driven supercharger. First run on 21 June 1922 initial performance was not as expected, as a result the bore was increased to 5.5 in (139.7 mm), with all variants after the Jaguar I using this dimension. Throughout its career the Jaguar suffered from vibration due to a lack of a crankshaft centre bearing.〔Lumsden 2003, p. 63.〕 The most powerful version of the engine, the Jaguar VIC, produced a maximum of 490 hp (365 kW) on takeoff at 1,950 rpm and weighed 910 lb (413 kg).〔Lumsden 2003, Part 4 - Engine Performance Figures.〕 The later Lynx was designed using one row of Jaguar cylinders.〔Gunston 1989, p. 18.〕
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