. Report of draft gear tests, United State Railroad administration, Inspection and test section; . 7 Time — Seconds Full lines represent the instantaneous kinetic energy of themoving cars. Figs. 72g and 72j—Energy Curves, Sessions K Gears Dotted lines represent the energy stored and absorbedluring the draft gear cycle. 156 Draft Gear Tests of the U. S. Railroad Administration 700 So/to* Buffer fn Cor A nTest Gear No. // /nCor 8. t/mpoct Ve/oc/ty= 600 500400 WO figure7ek * .05 JC 7 ./£ .20 25 .30 35 40 4S 1 Sec. Gear Cor— repress.(Sec. Draff Gear Cyc/i 300 20C\ Test GeorNo.
. Report of draft gear tests, United State Railroad administration, Inspection and test section; . 7 Time — Seconds Full lines represent the instantaneous kinetic energy of themoving cars. Figs. 72g and 72j—Energy Curves, Sessions K Gears Dotted lines represent the energy stored and absorbedluring the draft gear cycle. 156 Draft Gear Tests of the U. S. Railroad Administration 700 So/to* Buffer fn Cor A nTest Gear No. // /nCor 8. t/mpoct Ve/oc/ty= 600 500400 WO figure7ek * .05 JC 7 ./£ .20 25 .30 35 40 4S 1 Sec. Gear Cor— repress.(Sec. Draff Gear Cyc/i 300 20C\ Test GeorNo. /2 /r? Cor /ru est Ve/oc/, ?/i. too ^05 JO ./5 . Sec. Gear Re/ease ■ 25 30 35 40 45 Sec. Gear Compress. —■ Sec Draft Sea, Cyc/e- 100 Test Gedr No. /2 /n Car /r? Ve/oaty=437 MP//. 600500400 200 /oo figure7em 0 Sec. Gear Compress/on /0 .£ 5 20 25 .30 35 40 45 Sec Draff Gee tr Cyc/e Figs. 72k and 72m—Time-Force Curves, Sessions K Gears Draft Gear Tests of the U. S. Railroad Administration 157. So/id Buffer in Car/I Jesf Sear No. // in Car B /mpac-r Ve/ocrry= 45 % Tesr Sear in Car A les-r Sear No. //in CarB /mpac-r Veioci-fv = /./M. 1- j 1 figure 7ep ^ % .OS .n rrr- Sec Gear> JO IS 2i/,,» 5ec. Gear fie/ease. 0 .25 JO 35 * .40 .45 k °7° Compression «**•«■ O tfj <^ec Drtrfi- Gear Cyc/e 76 Test- Sear in Car A Test- Sear No. ii in CarB /mpac-r \/e/oafv=< D Sec. DrarT+ Gear Cyc/e. 77me—Seconds Curve D, determined from superimposed car-movementcurves, represents combined draft gear movement and yieldof car bodies. Curve C, obtained by eliminating car body yield fromcurve D, represents true combined movement of both gears. Figs. 72n, 72p and 72q—Time-Closure Curves, Sessions K Gears Curve B, traced on small drum, represents movement ofgear in Car B. Curve A, derived
Size: 2513px × 995px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorunitedst, bookcentury1900, bookdecade1920, bookyear1921
