. Railway master mechanic [microform] . ncomparison with curves for a simple engine. It willbe seen that the figures from the compound show high-er economy in the use of steam than the simple engine; sao Joe *o i 1? l« 1 °s Uj^ I 1 eo>**>m re j * wot p *** C0/74 rtio/ij. ffcvotu iififts > *r t\i nutc. IZ0 M0 /60 /BO ZOO ZZO Z40 Z60 Z80 300 Pig. not only is the best performance of the compoundfar better than the best performance of the simple en-gine, but that its average economy is hIso much higherthan the best performance of the simple engine. Theyalso show that the steam cons
. Railway master mechanic [microform] . ncomparison with curves for a simple engine. It willbe seen that the figures from the compound show high-er economy in the use of steam than the simple engine; sao Joe *o i 1? l« 1 °s Uj^ I 1 eo>**>m re j * wot p *** C0/74 rtio/ij. ffcvotu iififts > *r t\i nutc. IZ0 M0 /60 /BO ZOO ZZO Z40 Z60 Z80 300 Pig. not only is the best performance of the compoundfar better than the best performance of the simple en-gine, but that its average economy is hIso much higherthan the best performance of the simple engine. Theyalso show that the steam consumption decreases withan increase of speed within the limits of the test. Thepoint of minimum steam consumption for the simpleengine, about 180 revolutions per minute, has beencalled by Professor Goss the critical speed.* Thecurves show that for the 10-inch cut-off the criticalspeed of the compond is about 250 r. p. m., and for theIl-inch cut-off it is in excess of 270 r. p. m. Thisseems to indicate that the distribution of steam af-. Z-00 /.eo /60 /JO ico /zo mo eo /eo zoo zzo z*o Z60 zee 300Fig. by the compound arrangement of cylinders iswell adapted for use in connection with high speedsof rotation, and leads to the conclusion that the ob-jections to the compound locomotive, previously men-tioned, are not well grounded. It is not within the province of this paper to assignreasons for the increase of efficiency of the compoundlocomotive with speed within the stated At-tention is called, however, to the following significantfacts which may serve as a partial explanation. ** X3 it -Cl if »■—^ /nfi/t e^Ji jj^> 1 -i^ ** & ijjr 2* V: \ r> » -£££ ^2ia *~f >/^ V ^ ■> ^^^^T ^crc U1ier> i /St r ^ we. 1 e© 00 /eo /sc t*e ec too 20° 2zo 2*0 zoc zeo Joe Fig. 3. ♦Performance of the Purdue Locomotive, Schen-ectady; a paper presented at the May, 1897, the Western Railway Club, by Professor W. F. Cylinder condensa
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1895
