. Report of draft gear tests, United State Railroad administration, Inspection and test section; . 7T/ne — Seconals Curve D, determined from superimposed car-movement Curve B, traced on a small drum, represents movement ofcurves, represents combined draft gear movement and yield gear in Car B. of car bodies. Curve A, derived from curves C and B, represents simul- Curve C, obtained by eliminating car body yield from taneous movement of gear in Car D, represents true combined movement of both gears. Fig. 86n, 86p and 860—Time-Closure Curves, Bradford K Gears 254 Draft Gear Tests of the U
. Report of draft gear tests, United State Railroad administration, Inspection and test section; . 7T/ne — Seconals Curve D, determined from superimposed car-movement Curve B, traced on a small drum, represents movement ofcurves, represents combined draft gear movement and yield gear in Car B. of car bodies. Curve A, derived from curves C and B, represents simul- Curve C, obtained by eliminating car body yield from taneous movement of gear in Car D, represents true combined movement of both gears. Fig. 86n, 86p and 860—Time-Closure Curves, Bradford K Gears 254 Draft Gear Tests of the U. S. Railroad Administration 400300200 So/fof Buffer /r? Car A. Test Gear No. 46//? Car 3. /mpact^ \fe/ocity= MP/i. 207000*i %soo Gear • C/osure—/nc/?es m i - ^400| Test 6 i—*f^—t— ?ctr No. 47 //? Car A. Test Gear/va *to /n uar Ve/oc/t\/=2J5MPff. Q) D 300 k 200 Gear :/OSeaf » i ^1 x_ Gearf 2?OL SSr i\ ,i =. 66t Gear C/osure —/nc/ieeFigs. 86r and 86t—Force-Closure Diagrams, Bradford K Gears Draft Gear Tests of the U. S. Railroad Administration 255 A So//d Buffer /n Car ATest Gear CarB Car B/. 1 C/os/ng Speed Cor/H Mr- 1 1 / vj. sir fvL V (0 1 figure67a k M .OS- OD7~ ^ec Gear m JO ./S .20 .2S .30 .35 40 #£_ n/i>£> Sec Gear /Pe/eose. F ^Co/7pr-esston0~~ j~Sec Draft Gear Cyc/e,
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Keywords: ., bookauthorunitedst, bookcentury1900, bookdecade1920, bookyear1921
