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Aviation History
1926
1926 - 0941.PDF
DECEMBER 9, 1926 The BRISTOL AEROPLANE Co., Ltd. Bristol Aircooled Aero Engines Setting a Standard to the World THE " Bristol " Jupiter radial aircooled aero engine is recog- nised throughout the world today as the ideal power unit for all types of military and commercial aircraft by reason of its proved high standard of reliability and efficiency. So wide has been the recognition of the qualities of the engine replacement of any kind as has the " Bristol " Jupiter. It isworthy of comment that when this engine was stripped down for inspection after its 225 hours' running the official reportstated that the condition was excellent and the engine ready for further service after the replacement of one valve andspring. Since that time, the same engine has completed The "Bristol" Jupiter Series IV. that licences have been granted for its manufacture in France,Italy, Czecho-Slovakia and Japan, and today Jupiter engines are in service in most parts of the world in which flying isundertaken, including Great Britain, France, Poland, Germany, Norway, Sweden, Czecho-Slovakia, Italy, Russia, Roumania,U.S.A., Chile, Japan, Finland, Holland, Latvia, Netherlands, East Indies, etc., in increasing numbers. At the present timeprobably more machines are being constructed throughout the world to take the Jupiter than for any other type of engine.The reasons for the supremacy of the Jupiter engine are not hard to seek, for the excellence of the features embodiedin its design have been fully proved out in flying service. That the Jupiter is the lightest and simplest engine of itspower are points of importance ; but more important still is the fact that combined with lightness and simplicity theengine has proved to possess a standard of reliability and efficiency eclipsed by no other power unit. No other aeroengine, and indeed, no motor car engine, has ever completed an officially controlled flight of 25,000 miles without a several notable flights, including a record journey fromLondon to Cairo in 50^ hours. As the Jupiter engine is aircooled its running is unaffectedby variations of climate and temperature. Within the Arctic Circle in Sweden, during the torrid heat of the Mesopotamiansummer, and under the warm conditions during the French campaign in Morocco, the Jupiter engine has proved itsworth. As a result of the manner in which it demonstrated its high standard of efficiency in Morocco, a report wasforwarded to the French Ministries of War and Marine by Marshal Petain, highly eulogising the qualities of the Jupiterengine, and pointing out that it was the type of engine upon which he had been forced to rely for dependable runningduring the campaign. Three models of the Jupiter are available, of 6-3: 1, 5-3: 1and 5 : 1 compression. The first of these is especially suit- able for use with light single-seater and other militaryaircraft, normally operating at altitudes of 15,000 ft. or upwards. The commercial engine, as its name implies, has 810c E 2
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