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Aviation History
1940
1940 - 0485.PDF
FEBRUARY 15, 1940 AN EXCELLENT SCORE Twenty Years of Bristol Engines ON this and the following page are illustrated the best-known types of Bristol air-cooled radial engines builtduring the past twenty years. When the Cosmos Company was liquidated in 1920, the Bristol Company decided to start an engine department, and proceeded to develop the famous Jupiter, the successors to which are the Pegasus and the Mercury poppet-valve units, and the outstanding Perseus, Hercules and Taurus sleeve-valve engines. Three carburetters were fitted on this early Bristol Jupiter, the first air-cooied unit to pass the Air Ministry's type test. The three- cylinderLuciier, originally rated at 118 h.p., was used mainly in training air- craft. A later version, the Lucifer IV, de- livered 140 h.p. Although the best-known Bristol single-row radials have nineg the Neptune (top) had seven A contemporary he Titan, had five. Below the Neptune is the first iry; the supercharged direct-drive Jupiter VII, and the first geared Jupiter VIII.
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