. American engineer and railroad journal . could not be got inSydney), in the form of a double-stranded coil, encased in 48o THE AMERICAN ENGINEER [October, 1893. asbestos, and placed just over the liacklione of the appa-ratus. The inethvhited spirits of wine, drawn from atank placed above the boiler, vaporized, mixed with air andspurted into the furnace. As much as (>.!• cub. in. of waterhave been evaporated by cub. in. of spirit in 80 seconds,making 182 double vibrations of the iiropelling wings, say,!) per second, and developing (>!) horse power. It was estimated tha
. American engineer and railroad journal . could not be got inSydney), in the form of a double-stranded coil, encased in 48o THE AMERICAN ENGINEER [October, 1893. asbestos, and placed just over the liacklione of the appa-ratus. The inethvhited spirits of wine, drawn from atank placed above the boiler, vaporized, mixed with air andspurted into the furnace. As much as (>.!• cub. in. of waterhave been evaporated by cub. in. of spirit in 80 seconds,making 182 double vibrations of the iiropelling wings, say,!) per second, and developing (>!) horse power. It was estimated that if the apparatus were loaded with10 oz. more of sjiirit and water, and thus made to weighthe same as the compressed-air machine Ko. 12, which flew343 ft., then the steam ajiparatus No. 17 would possess asufficient store of energy to Hy 1,(;40 yds., or nearly 1 mile. But M. Hargravc has done still better, for in March, ,he prepared a paper, which was presented to the Confer-ence on Aerial Navigation at Chicago, August 2, 1803, in. Fio. SO,—IIARGRAVE-1893. which he gave data concerning his No. 18 flying apparatus is also driven by a .steam-engine whichweighs, with 21 oz. of fuel and water, an aggregate of 7lbs., and indicates horse |)ower, or at the rate of per horse power ; so that, roughly speaking, theweight of the motor has been doubled, and the power hasbeen increased fourfold. Four boilers were constructed. The final one was madeof 21 lineal feet of J in. copper l)ipe, with an internal diam-eter in., and arranged in three concentric verticalcoils whose diameters were in., 2.() in., and in. re-spectively. It weighed 37 oz., but it is now known thata coil of equal capacity can be made weighing only 8 oz.,and still excessively strong. The cylinder is 2 in. diam-eter, with a stroke of in. The feed-pump ram is diameter, and the piston valves in. diameter. Onone occasion this motor evaporated cub. in. of
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
