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Aviation History
1922
1922 - 0743.PDF
DECEMBER 14, 1922 recalled that the " Jupiter " and- " Lucifer " aero engines were produced by the Cosmos Engineering Co. of Bristol, chief designer of which was Mr. Roy Fedden. When the Cosmos company closed down, the patent rights for these engines were acquired by'the Roy Fedden, Chief Designer. Bristol Aeroplane Co., of-Filton, Bristol, and Mr. Fedden transferred his services to the latter firm, whose chief engine designer he now is. Since being taken over by the Bristol Aero plane Co. the " Jupiter " and " Lucifer " engines have been further developed and improved, and have now proved themselves thoroughly. The " Jupiter " of 400 h.p. has passed both the British Air Ministry type- tests and the French tests imposed by the L Three-quarter front view of the Bristol " Jupiter " aero engine. Section Technique, and recently arrangements have been completed for manufacturing the Bristol engines in France (by Gnome and le Rhone Co.), which is somewhat reversing the old order of things. The 400 h.p. " Jupiter " has been fitted in a number of British machines, among which are the " Bristol " 10-seater commercial biplane, the " Bristol " racing monoplane, the " Bristol " " Bullfinch," the Handley Page W.8, the new Short all-metal machine and others. Light weight and low petrol consumption are features of both the " Jupiter " and " Lucifer " engines, while the relatively small number of cylinders results in having few moving parts, few valves and sparking plugs to renew, and generally easy and cheap upkeep—each of them qualifications which make a very strong appeal to those who are considering the utilization of aircraft for commercial purposes. The characteristic features of both this engine and the smaller " Lucifer " type are clearly shown in our photographs on this and the previous pages. The " Bristol " " Lucifer," of 100 h.p., has been fitted in the Bristol monoplane, the Avro 504, and, recently, in the new " Bristol " three-seater, which but for lack of a suitable stand would have been exhibited at the present Paris Aero Show. A feature of both " Bristol " engines is the swivelling engine- plate mounting by means of which the back of the engine is easily accessible for inspection, cleaning or repairs. The whole engine plate is mounted on hinges on one side, and, after undoing two pins, the engine can be swung forward and outward, when the whole back of the engine is within reach of a mechanic standing on the ground. The Bristol Aeroplane Co. have also produced a very neat little gas starter for aero engines, consisting of a small air-cooled petrol engine with a pumping cylinder supplying combustible mixture, through a series of pipes, to all the cylinders of the main engine. The starter is designed as a complete unit, and weighs but 40 lbs. It will start from cold any aero engine up to about 400 h.p. in a few seconds. A great advantage of this type of starter is that it can be placed anywhere in the aircraft, within convenient reach of the pilot, and can be used to start both engines of a twin- engined machine. For commercial aircraft it is often of great advantage for the pilot to be able to re-start his engine after a forced landing en route without calling upon the local The " Bristol » engine-starter is made as a complete unit, inhabitants,_if any, for assistance. 743
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