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Aviation History
1916
1916 - 0137.PDF
FEBRUARY 17, i9t6 Two views of the new 100 h.p. Aeromarine engine showing the propeller reduction gear fitted in position. i.e., six cylinders arranged vertically, 4 ins. bore and 5 ins. stroke, with concentric valves located in the heads, and with large copper water jackets electrically deposited. The cylinders are now fitted with domed water-jacketed heads instead of the flat type previously employed. The cylinder wall jackets are deposited from the base of the dome to within 3 ins. of the cylinder base, giving a large cooling surface. The sparking plugs, of which there are two to each cylinder, are now located in the head, the current being supplied by two magnetos arranged in tandem, one on each side of the engine, and driven off the end of the crankshaft. As before, the cylinders are cast separately from vanadium iron, and great care has been exercised in the development of the flanged base of the cylinder in order to retain the initial strength necessary to withstand the working stresses, at the same time permitting of uniform expansion both of the base of the walls and the skirt of the piston. Perhaps the most interesting feature of this engine is to be found in the design of the propeller end of the crankcase. This is such that the same engine may. be used either with the propeller mounted directly on the crankshaft or geared down. The gear drive consists of a pair of gears of 1 to 1*75 ratio, the small gear mounted on the end of the crankshaft and carried by a ball bearing on both sides of its hub, the ball bearings in their turn being carried by the aluminium gear housing. This housing is bolted to the motor on a dowel flange face, securing at all times an absolute alignment. In the upper compartment of this housing is fitted the propeller shaft mounted on large annular ball bearings. This shaft is also provided with thrust bearings, two sets mounted in both directions, enabling the motor to operate as tractor or pusher without change; when it is desired to use the motor with the propeller coupled direct, it is only necessary to dismount the gear housing from the crankcase and mount the extension on to the crankshaft in the same position, and by the same means as were used to retain the gear drive pinion, the straight drive housing is then mounted on to the dowel flange face together with its annular and thrust bearings as before mentioned. At the other » ® Aeroplanes from Mauritius. WITHIN three weeks a sum of over £5,000 U reported to have t>een raised by public subscription with the object of presenting aeroplanes to the Army. As a start the sum of £4.500 has been paid over by the Crown Agents for the Colonies to purchase two gun-cirrying machines. German Honour for Fokker. IT is not surprising to hear from Amsterdam, that Herr Fokker, extremity of the crankshaft further additional ball beatings are employed to carry the load of driving the camshaft, water and duplex oil pumps and magnetos. All bearings End view of the new 100 h.p. Aeromarin* engine. throughout the motor, other than ball, are die cast Fahrig metal and interchangeable. As regards other details, lubrication, &c, these do not differ materially from those obtaining in the previous model. ® ® the designer and builder of the speedy much-boomed German mono plane of that name, was decorated at the Schwerin aerodrome on February 7th with the Mecklenburg Cross for Merit in War by the reigning Grand Duke. Germany Advertising for Aeroplane Workers, THE way in which Germany is endeavouring to extend her aviation industry is illustrated by an advertisement in the Berlin Vorwarls for 200 neutral workers for an aeroplane factory. 137
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