. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . () miles per enevRy, 2,5,OO,nO0 foot pounds. the casual observer or light thinker; noris it altogether the low speed at whichthe train is running which does the dam-age. It is the destructive or collisionenergy which that train contains, andwhich might have been controlled, butwas not, that does the damage. It is the last few feet that countsmost. The Derby winner is notobliged to defeat his competitors of therace track by coming in one-third orone-half of the distance around t
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . () miles per enevRy, 2,5,OO,nO0 foot pounds. the casual observer or light thinker; noris it altogether the low speed at whichthe train is running which does the dam-age. It is the destructive or collisionenergy which that train contains, andwhich might have been controlled, butwas not, that does the damage. It is the last few feet that countsmost. The Derby winner is notobliged to defeat his competitors of therace track by coming in one-third orone-half of the distance around the en-. i sou lOU CUO 800 1000 1200 1100 ICUO 1800 2000 FIG. 5. 70 MILES PER HOUR STOPS. Note lontcer stop and collision energy of the ordinary braked train. tire course ahead of his competitors, toprove his deserving superiority. Ahalf a neck, a foot or two, will suffice,and will raise his value many hundredsof dollars above that of his closest com-petitor who comes less than three feetbehind the winner. The athlete who runs a successfulrace is not expected to win the hun-dred-yard dash in half the time requiredby his closest competitor to cover thecourse, to establish a deserving superi-ority. So it is with the air brake. Itis the last few feet that count most, traveling public as does the man whocan make two blades of grass growwhere before only one grew. Fig. 8 is a brake cylinder pressurecard, obtained during the same runthat supplied data for the speed andcurve card shown in Fig. 2. It was madeby an nidicator inside of the coach. Thepressure line was gotten by running aconn
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