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Aviation History
1909
1909 - 0826.PDF
DECEMBER 25, 190c- one of the points which is well demonstrated in the photograph. In addition to the induction-pipe, and those tubes to which we have just referred, no difficulty will be experienced in recognising the water-pipe that conducts the cooling water from the centrifugal pump at the rear end of the engine into all four cylinder heads, nor will the reader fail to observe that this centrifugal pump is mounted transversely and driven by worm- gearing. Lubrication is on the forced system, operated by a special parallel-drive pump, which is situated at the front end of the crank-chamber, while in connection with it is installed the special pattern of drain cock and gauge used on the De Dion cars. The top of the gauge may indeed be observed quite easily, projecting up between the two near-side cylinder castings in the close vicinity of the tube conducting the ignition wires. Cyk. I 2 4 8 h.p. i 4 6 8 9 IO 10 14 18 25 35 70 at r .p.m. i,8oo [,600 ,5°°[,500 [,500 ,500 [,500 ,5°°,5°° 1,500 1,500 i ,000 Bore. mm. 66 84 90 100 100 80 66 75 90 100 120 150 Stroke. mm. 70 90 110 120 130 120 IOO I2O I2O 130 Mo 180 Weight. kilogs. 26 5°67 98 106 98 104 i37 182 240 265 670 Pric francs 500 600 750 1,100 1,250 2,200 2,500 3.4OO 4,000 4,500 5,400 12,000 TESTING " WOLSELEY "ENGINES FOR FLYING MACHINES. ALREADY brief mention has been made in these columns of the special method that has been adopted by the Wolseley Tool and Motor Co. at their famous Birming- ham factory for testing the light V-type engines which they have been building for some time expressly for aeronautic work. We are now able, however, to demon- strate the precise means that are in vogue, whereby the prolonged brake tests to which every engine is subjected are conducted on a travelling test-bench instead of within the usual shops, for the two photographs reproduced herewith show the actual operation in process, including as they do two views of the motor car chassis with its complete testing equipment. One of the standard 8-cyl. engines, which are nominally of 50-h.p., but which develop some 74 b.h.p., in spite of the total weight being only 300 lbs., is to be seen fixed on a special bed-plate at the rear of the chassis. The engine is, moreover, fitted with the large fan that con- stitutes the dynamometer, or power-absorbing brake which indicates the exact capabilities of the engine as regards output, and all the other instruments and acces- sories such as tachometer, fuel-tank, are installed around it just as they would be in any testing room. shocks that are of a considerably more severe character than is likely to be encountered by it when at work under normal conditions at any future period. Smoothness- A 50-h.p. 8-cyL engine is fixed in place on the test'bed at the rear of the chassis,and all the necessary apparatus is installed for a full'load run of long duration, while the chassis is being driven around the rough track at the Wolseley factory. During, the whole time the test is in progress, the chassisf'fs being driven at a..high speed around a rough track, wKich'subjects the engine to a continuous series of In the above rear view of the testing chassis, the air-brake,,which absorbs the full power of the engine, is prominent. and efficiency of running are therefore tested in a manner •"•, which means considerably more - to the purchaser than if the operation were performed on a stationary base-plate. Considering the care that is- taken to ensure reliability from these " Wol6eley" engines, it is hardly to be wondered at that quite a number have already been supplied to experimenters who have been building aero- planes, or that as a result of the performances of those already in use the demand for them has rapidly been increasing. Some of them have found their way to France, and have there fully proved their reliability in long flight. 828
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