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Aviation History
1948
1948 - 0548.PDF
SAFETY. and consistent fuel consumption Satety on ocean flights demands reliable fuel consumptions. Bristol Sleeve Valve Engines give a triple safeguard: 9 The fuel injection system is not affected by icing or changes in airflow pattern and there are no air metering passages to get obstructed. The normal fuel filter is supplemented by a special felt filter which normally remains untouched between engine overhauls and protects the fuel metering device from dirt in the fuel. 0 Due to the excellent mixture distribution, the Bristol engines operate satisfactorily on a very lean mixture and will work over a relatively wide range of mixture strengths with little change in specific fuel consumption. The fuel air ratio is, therefore, not critical and small errors can be tolerated. % Since there are no poppet valves to deteriorate or get out of adjustment, loss of engine per- formance is not likely but if any occurs it is shown immediately on the torquemeter, which is an optional feature on all current Bristol engines. The torquemeter, in conjunction with a fuel flowmeter, will give an immediate indication of excessive fuel consumption. THE BRISTOL AEROPLANE COMPANY LIMITED ENGLAND
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