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Aviation History
1949
1949 - 0798.PDF
MAY 5TH, 1949 FLIGHT Advertisements III «l <* || I II I II «£ . . . machining the large locatingdiameter on a supercharger impeller casing is but one of the 105 operations which this component undergoes. The machining—illustrated above—is performed with carbide tipped tools, permitting high speeds and feeds and giving a good finish. This particular diameter—nearly 27"—-is machined to a tolerance of 0*005". All of the standard gauges used during machining operations are set from the same magnesium alloj as the component, ensuring accurate and co-related measurement despite the fluctuation of shop tem- perature which otherwise would affect the differing coefficients of expansion of different metals ... an example of many precision factors tt'hicb"^^ contribute to "Bristol" sleeve-valve reliability. THE BRISTOL AEROPLANE COMPANY LIMITED ENGLAND
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