. Railway mechanical engineer . Boiler Pressure 198 Lb. Mean Effecffye Pressure- Lb. Miles Per Hour- 44 tndfcafed Horsepower. 34 ^4. Boiler Pressure 200 Lb. Mean E-ffecfive Pressure 99 Lb. Miles Per Hour 40 Indicafed Horsepower 5404 Typical Indicator Cards Taken on Road Tests hauling train No. 4, consisting of 11 cars weighing 816tons, at a speed of 50 miles an hour on an ascending gradeof per cent developed 3,500 indicated horsepower. Thisis at the rate of one horsepower for each lb. weightof the locomotive; moreover the power developed is p)ercent greater than the rated
. Railway mechanical engineer . Boiler Pressure 198 Lb. Mean Effecffye Pressure- Lb. Miles Per Hour- 44 tndfcafed Horsepower. 34 ^4. Boiler Pressure 200 Lb. Mean E-ffecfive Pressure 99 Lb. Miles Per Hour 40 Indicafed Horsepower 5404 Typical Indicator Cards Taken on Road Tests hauling train No. 4, consisting of 11 cars weighing 816tons, at a speed of 50 miles an hour on an ascending gradeof per cent developed 3,500 indicated horsepower. Thisis at the rate of one horsepower for each lb. weightof the locomotive; moreover the power developed is p)ercent greater than the rated cylinder horsepower and per Xo%EMBER. 1922 RAILWAY MECHANICAL ENGINEER 617 cent greater than the rated boiler horsepower according toColes method. This performance has been nearly equalled on other occa-sions. On September 26. hauling 11 cars weighing 823tons, 3,404 indicated horsepower was developed at 40 milesan hour, and indicated horsepower at 44 miles anhour. The indicator cards taken at these three sp>eeds arereproduced in one of the illustrations. Although accurate test data are not available, it is evidentfrom
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