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Aviation History
1944
1944 - 0892.PDF
"iign; May 4th, 1944. Advt. * . Ci :j wwsiwM"!?!!---^ THE SLEEVE VALVE EXPLAINED No. I MINIM ISING WORKING PARTS There is nothing complicated about " Bristol " sleeve valves or their operating mechanism. Basically, each valve is a steel cylinder with four ports at the top and an operating band at the base. A ball-joint is attached to this band to accommodate a driving-crank, and all sleeves are operated through a train of gears ; the master being located on the engine crankshaft. Working parts are reduced to a minimum. There are no cams, tappets, rockers, or valve springs ; therefore valve bounce and its attendant loss of power is impossible. Once the engine is assembled, valve timing is positively determined ; and the usual valve inspection and adjustment routine, so necessary with other engines, is entirely eliminated. Once you realise the advantages of the sleeve valve you will understand the reliability of * I 4- SLEEVE VALVE AERO ENGINES
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