. Report of draft gear tests, United State Railroad administration, Inspection and test section; . of car bodies. Curve C, obtained by eliminating car-body yield fromcurve D, represents true combined movement of both gears. Curve B, traced on small drum, represents movement of gear in Car B. Curve A, derived from curves C and B, represents simul-taneous movement of gear in Car A. Figs. 76n, 76p and 76q—Time-Closure Curves, Sessions Jumbo Gears 186 Draft Gear Tests of the U. S. Railroad Administration 600 -2AS— — So//cf Buffer //? Car A. 600 7est Gear No. f4 triCarB. /mpact Ve/oc/ty =(± ->
. Report of draft gear tests, United State Railroad administration, Inspection and test section; . of car bodies. Curve C, obtained by eliminating car-body yield fromcurve D, represents true combined movement of both gears. Curve B, traced on small drum, represents movement of gear in Car B. Curve A, derived from curves C and B, represents simul-taneous movement of gear in Car A. Figs. 76n, 76p and 76q—Time-Closure Curves, Sessions Jumbo Gears 186 Draft Gear Tests of the U. S. Railroad Administration 600 -2AS— — So//cf Buffer //? Car A. 600 7est Gear No. f4 triCarB. /mpact Ve/oc/ty =(± ->MP/i. 400 377,000* » 300 100 too Figure 76r 0 i f » 1 J \ Gear C/osure —//ycfies 60C 283- 1 1 7est Gear No. 15 /n Car A. £00 Test Gear No. /4 /n Ozr 3. > Impact Ve/oc/7y= 300 t 200 GearC/osedU37000#-^ , 1 TesT bear Mo. f4 l^~2*Car 3 —r*-f too -->- ~^Z~%st Gear No: /S figure ^-*—~ Car A p^S-^ let C ) / 1 > c \ (Gear C/osure —focfres Figs. 76r and 76t—Force-Closure DiacramsSessions Jumbo Gears Draft Gear Tests of the U. S. Railroad Administration 187. TFme—Seconds Fig. 77a—Car-Movement Curves, Superimposed. National M-4 GearsThese Curves Drawn by Cars in Test 188 Draft Gear Tests of the U. S. Railroad Administration
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Keywords: ., bookauthorunitedst, bookcentury1900, bookdecade1920, bookyear1921
