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Aviation History
1952
1952 - 0682.PDF
fijillf PRECISION FACTORS CONTRIBUTING TO 14 MARCH 1952 ENGINE EFFICIENCY Dynamic balancing of rotating onents To minimise vibration and reduce bearing loads at the high speeds employed in turbine engines, it is not sufficient for rotating components to be simply in static balance, they must also be dynamically balanced. The operator in the illustration is setting up a Proteus compressor rotor on a "Gisholt" dynamic balancing machine. This machine rotates the component to be balanced, and measures the bearing reactions at each end of the rotor. Electronic equipment determines the magnitude and location of any out-of-balance forces, so that they may be eliminated, either by adding or removing metal at the appropriate positions. All the major rotating components of "Bristol" turbine engines are dynamically balanced before assembly into the engine. The machine illustrated is one of many similar balancing machines used in the "Bristol" workshops. Sleeve-valve and turbine engines for reliability THE BRISTOL AEROPLANE COMPANY LIMITED nomy 996E ENGLAND
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