. The street railway review . the hcgin-iiinK very satisfactory results. As, however, reverse current islikely to act lietter in the case of liigiicr speeds, the reiiort of therecent experiments will nndouhtedly Rive more satisfactory method of lirakinR, however, is only intended for emergencyuse. In regard to the resistances of the cars the mean value of ton as obtained for a speed of about 1 (o km. per hour is materially below the figures calculated from the usual resistance formuhe. Extensive experiments were made to determine the consumptionof energy both at the ge
. The street railway review . the hcgin-iiinK very satisfactory results. As, however, reverse current islikely to act lietter in the case of liigiicr speeds, the reiiort of therecent experiments will nndouhtedly Rive more satisfactory method of lirakinR, however, is only intended for emergencyuse. In regard to the resistances of the cars the mean value of ton as obtained for a speed of about 1 (o km. per hour is materially below the figures calculated from the usual resistance formuhe. Extensive experiments were made to determine the consumptionof energy both at the generators, where records were taken atintervals of 10 seconds, .and on the cars where the readings weretaken at intervals of from 15 to 30 seconds. In starling the carswith .accelerations ranging between and m. per second the of energy in the car at the collectors ranged between 400kw. (S44 h. p.) and 740 kw. ( h. p.). In the case of pro-longed runs, however, the consumption of energy varied bit wren. SHOWINO TKVCK OF SIEMENS ,\ C.\«. 148 kw. corresponding to a speed of 90 km. and 520 kw. correspondingto a speed of 140 km. It may be stated in this connection kw. (2,600 li. p.) were required to obtain the speedsof upwards of 200 km. recently attained. The resistance of the air was carefully studied in these experi-ments and recent trials gave values as high as 210 kg. per s(iuaremeter for the air pressure. After the trials were made in igor a thorough rebuilding of thetrack was found necessary. This work occupied part of the year1902. the remainder of which was taken up in the continuation ofexperiments on the consumption of energy, etc., for speeds up to130 km. The results of the improvement in the track were foundto be most satisfactory and even surprising; the track not onlyeasily withstood the strain to which it was put by trials at constantlyincreasing speeds, but the cars ran so smoothly as to make of the ra
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
