. Railroad digest . to about metre(4 ft. 11 in.) in accordance with recent American practice. 7. Spark arresting devices are rarely very efficient withoutimpeding the draught. It is therefore advisable to use theseappliances as little as possible, and to simplify them to asgi-eat an extent as the quality of the fuel and the character ofthe country run through may permit. S. Of all apparatus intended to utilize the waste heat of theexhaust steam the injector is the only one which is found fre-quently in use; this apparatus appears to ensure some smalleconomy in fuel, and to result in easie
. Railroad digest . to about metre(4 ft. 11 in.) in accordance with recent American practice. 7. Spark arresting devices are rarely very efficient withoutimpeding the draught. It is therefore advisable to use theseappliances as little as possible, and to simplify them to asgi-eat an extent as the quality of the fuel and the character ofthe country run through may permit. S. Of all apparatus intended to utilize the waste heat of theexhaust steam the injector is the only one which is found fre-quently in use; this apparatus appears to ensure some smalleconomy in fuel, and to result in easier steaming. Broken Piston Rods Railicay and Locomotive Engineering, Nov., 1901, p. 468. In connection with the illustrations of broken piston rods,Mr. W. E. Symons, superintendent of motive power of thePlant System of Railways, writes as follows: I send you herewith a blueprint showing some specimensof broken piston rods. Comment is unnecessary. I recentlyhad quite an epidemic of broken rods on the system, they be-. ing confined largely to about two divisions. In each casethe master mechanic in charge complained that material fur-nished for piston rods was defective in quality. Tests madeof the samples of these broken rods, however, developed atensile strength of 47,000 to 50,000 pounds per square method of fitting them up in the shop, I think, dis-closes clearly the of failure. Flanges or Blind Tires Railroad Gazette. Nov. 15, 1901, p. 787. At the October meeting of the Rocky Mountain RailwayClub the. question of blind tires again came up. In thecourse of the discussion the following letter from F. , recently Superintendent of Motive Power and Ma-chinery, Mexican Central, was read: We are running consolidation engines on our mountaingrade of 3 per cent., with 24-deg. curves and 75-lb. rails; guard rails on all curves exceeding 17 deg. These locomotiveshave all the drivers flanged; 15-ft. driving wheel base, 23 in. total wheel base of engines, 16
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