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Aviation History
1932
1932 - 0203.PDF
FLIGHT, MARCH 4, 1932 Introducing ^ Pegasus A New "Bristol" Engine Series FROM the time, just after the war, when it was pro duced as the " Cosmos Jupiter," the Bristol " Jupiter " engine has undergone continuous de velopment. Except for the A.B.C. radials, which did not attain any great degree of success, the " Jupiter " was the first British aero engine of this type, and when the engine was taken over for development by the Bristol Aeroplane Co., Ltd., its designer, Mr. Roy Fedden, and his chief assistant, Mr. Butler, accompanied it to Filton. It is not without significance that all the subsequent de velopment work on the " Jupiter " has been carried out under the guidance of those to whom the engine owes its inception, and no better testimony to its qualities could be found than the fact that the " Jupiter " has been built under licence in a large number of foreign countries. The Bristol " Jupiter " has ever kept pace with the times, and has by stages become more powerful, partly by increased speed and partly by various stages of super charging. Its thrust horse-power has been increased by fitting it with propeller reduction gearing, and some years ago it was further improved by being fitted with a set of cylinders of new design, known as the " F " type. It is now felt, however, that the time has come for a complete re-design of the engine. Modern conditions are such that there is an increasing demand for supercharging, airscrew gearing, and drag-reducing cowlings, and mere THE " PEGASUS " : In this three-quarter front view may be seen the small airscrew gear casing, the oval tubes fairing the push rods, and the large air space between the cylinder heads and the enclosing covers of the overhead Valve rockers. 187
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