. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . 6 4V2 6 9i4 8 S^/s 4J4 9.^^ Wa Wa m 7% 21 14382250 \y1^ 4 1315 342 01512 8 with a 10-lb. brake pipe reduction and the 8 pressure remaining in the cylinder at the 8 .49 end of one minute under a leakage pro- 10 portional to that obtained with a 50-lb. 8 initial pressure. The calculation of the 8 leakage for each case was based on the 10 hypothesis that the leakage is propor- 10 1898 1
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . 6 4V2 6 9i4 8 S^/s 4J4 9.^^ Wa Wa m 7% 21 14382250 \y1^ 4 1315 342 01512 8 with a 10-lb. brake pipe reduction and the 8 pressure remaining in the cylinder at the 8 .49 end of one minute under a leakage pro- 10 portional to that obtained with a 50-lb. 8 initial pressure. The calculation of the 8 leakage for each case was based on the 10 hypothesis that the leakage is propor- 10 1898 tional to the absolute initial pressure. 8 This will make the leakage a trille high, 10 but by a difference from the actual that 10 is negligible. In order to emphasize this 10 .58 condition, a diagram has been prepared 8 showing the variations. In this diagram 8 the unshaded upper portion added to the 10 shaded lower portion represents the initial 10 pressure as developed with a 10-lb. brake 4S-SO 36-40. Af/ac//e /^f-/o/7hc SocMeasf- /W/aa/e IVes/- A/or/h/vesf C^o Ter/n/rro/^) fVestcr/T /f^Si/l-TS or ^ Lea(:ec/ S/6s. & Less7S. / fa - oyer s ^ 6^ ^ - /s 2f. / ^ . - .. 2S Average LedA:ooe /or 70C> Car^ -//./9/6^. O/y^ M/Afur£i CYLINDER LEAKAGE TESTS MADE ON 70O FREIGHT CARS CAUGHT AT RANDOM AT SEVEN DIFFERENT TERMINALS IN U. S. A., 1920 (100 CARS TESTED AT EACH TERMINAL) In addition to the data gathered in tho pipe reduction. The lower shaded por- field, and bearing directly on the matter tion represents the pressure remaining in hand, there have been added two columns in the cylinder at the end of one minute, showing the initial pressure that would This condition is even worse than the have been developed in the brake cylinder first. On some cars there is no pressure March, 1922 RAILWAY A LOCOMOTIVE ENGINEERING 7S remaining; on others there has been no
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Keywords: ., bookcentury1900, bookdecade1900, bookidrailwaylocom, bookyear1901
