. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . akes on this run of20 miles would be approximately 2,463cu. ft. or cu. ft. per car or cu. ft. per car per minute. On the run down the eastern slope ofthe Alleghenies from Christiansburg toElliston, a distance of about 12 miles,and lasting for 42 minutes 30 sees., thetotal number of return strokes madeby the two pumps was 1,105, which onthe same basis of delivery puts the airconsumption of the brakes at 1,304 or about cu. ft. per car or alittle less than .43 cu. ft. p
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . akes on this run of20 miles would be approximately 2,463cu. ft. or cu. ft. per car or cu. ft. per car per minute. On the run down the eastern slope ofthe Alleghenies from Christiansburg toElliston, a distance of about 12 miles,and lasting for 42 minutes 30 sees., thetotal number of return strokes madeby the two pumps was 1,105, which onthe same basis of delivery puts the airconsumption of the brakes at 1,304 or about cu. ft. per car or alittle less than .43 cu. ft. per car perminute. This is so far below the capacity ofthe pumps to supply, that a train ofone hundred of these cars could prob-ably have been handled with equalfacility by a single engine. In fact, theair consumption on the grades was justbelow the capacity of a single 9j^, and the demands made upon theair supply for the whole length of therun was well below the capacity of butone of the pumps with which the enginewas equipped. There will probably bea slight variation from these figures in. April, 1921 RAILWAY AND LOCOMOTIVE ENGINEERING 97 . ^ _i .. ::::::__ :: j _^ , _s — ■ - _i ;;;E;;ii; ^ ;,C, -I- 1 ,:gj^ijX. J. J f-^-l-- Ja -■■-■■tttinTiiiimnT IMflll 1 nnrf+ I++H- ^ N---:|ffi||2 J\\w\\ :: _s :;:::::::: :::: ::::::: -2 ■t :::::::::: :::: ::::::: _i IfffffU fH Ji . : \:l ! I. :l ii- ■^ -\W\ [ 111 HI j 1 )|)) 1 CV 1^ V (.ir t; 5 ^ .. t •> I !!!!!!!|!Mil; -■■•■■■- ttfH hT -S. P - - - -T- r |\ ^ C -J ■■■:S _ ^ := = - + :: -5 :::: ::: fftttttfR --- t::-.|-; t:::±:: ::::■ ■-CSJ J i ::::::; li^lgi.; r; ;_:: tt: ::::- ::::::: :::| : 3 ::::::: :::| :: :: 1 :;: : Jl _ _ JI _ _ . ._ -!:>. >■-- ::«ii -H 1 ttttttt ff- IfM;* v; * : ::::::: :::: ::;::.: ]] — -* -o ^ ■* 1^ : ::::::: ::::| :: - _^ : ::::::: ::: _5 : ::::::: ::: | --- - fffmHTn- : ! i i _^ EI 5-^ H KO o H w > O O OU w -to CO m o -oil
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