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Aviation History
1928
1928 - 0946.PDF
OCTOBER 11, 1928 "GENET LYNX "JAGUAR* ARMSTRONG-SIDDELEY ENGINES AT THE BERLIN SHOW: Four types, shown above, are on view;the "Genet," the "Mongoose," the "Lynx," and the " Jaguar." All are air-cooled radial engines. with valves, valve mechanism, etc., pistons, gudgeon pins, etc., master and auxiliary connecting rods , front nose piece and timing gear ; oil pump and filters ; propeller boss and bolts ; bearer plate and various minor details. It will be realised that, from an economic, service and maintenance point of view, this policy is an important step towards better and cheaper flying services. The 80-88 h.p. " Genet " five-cylinder engine represents the latest developments in air-cooled practice. This engine is eminently suitable for the owner-piloted light aeroplane, being most economical to run and easy to maintain. It is extremely simple in construction and, we believe, is 100 lbs. lighter than any other engine of similar power. Dual ignition, rubber-covered push rods, complete accessi- bility to all adjustments, cleanness and smoothness in running and easy maintenance are amongst the many finer features of the Armstrong Siddeley aero engines. The new valve rocker gear (as seen on the " Lynx " engine) is, after exhaustive tests, being standardised on the " Jaguar" and " Mongoose " engines. The rocker end is inclined to bring it into line with the push rod, thus preventing any side thrust on the rocker bearing. The top ball end of the push rod has been flattened, and the thrust is taken on the pad in the valve rocker cup, which is radiused slightly at right angles to the rocker, giving universal action. A fully-grooved distance piece is now employed giving a very free access for the grease to the bearing. Easy adjustment of the valve clearances is now obtained by screwing or unscrewing the valve rocker cup from above the rocker. THE BRISTOL AEROPLANE CO., LTD. IN SO far as aero engines are concerned, the Bristol Aeroplane Co. of Filton, Bristol, is well represented at the Show. Altogether, they are exhibiting four types of aero engines. Of these, three are of the " Jupiter " family, while the fourth is the new cousin, " Titan," The four types shown are : the " Jupiter VIA," the " Jupiter VII," the " Jupiter VIII, and the " Titan." Bristol " Jupiter " engines—especially the Series VIA—- are, we think, well known to most people in the world of aviation, so it will not be necessary for us to describe in 876
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