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Aviation History
1944
1944 - 2120.PDF
Advertisements. FLIGHT OCTOBER IOTH, 1944 r 1 POSITIVE VALVE TIMING . . /^\NE great advantage of the sleeve valve is the elimina- ^"*-^ tion of valve bounce and its attendant loss in efficiency On " Bristol " engines all sleeves are operated through a train of gears and each sleeve has its own operating crank Valve timing is therefore positive. Whatever the engine speed the movement of each sleeve is smooth and constant ; and the valve plan remains unaltered. Once a " Bristol " engine is assembled no valve adjustments are necessary. No wonder " Bristol " sleeve valve engines maintain their power and efficiency over exceptionally long periods. This is one of a series of twelve advertise ments prepared for retention, and con stitutes a simple story of sleeve-valve advan tages. Previous copies are available on request to the Bristol Aeroplane Company Ltd..Bristol. jgL* JC, z&u. SLEEVE-VALVE «?, 'tried- /uo4t&&te€/<&n&lt;/d&v&az/i&z rfv& dwtgw? d/e&ve-twwe e^tawte'
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