. American engineer . els outside ^% 75% 3_ - - * s 1 1 1 / t // / / / ^ {ss. 7% I-^ y^ ^ ^ y^ so% ^ ^ ^- ^ < ) J^ ^ _ < ) -^ r /-2- 5ei- c Q-L irge Whee s Ou Isidi 3- Se-f G -Large Whee Is In side Tan. ^ 3° t 7° IS 6 Deg. 12 Deg. Set II. There was a peculiar combination of wheel condi-tions in Set H. The pair composed of wheels 1 and 2 wasmated, whereas 3 and 4 were non-mated, wheel 3 being smallerthan 4 by 54 in. It is also to be noted that the wheels on thesame side of the truck were not mated, that is, wheel 3 was %in. smaller than wheel 2
. American engineer . els outside ^% 75% 3_ - - * s 1 1 1 / t // / / / ^ {ss. 7% I-^ y^ ^ ^ y^ so% ^ ^ ^- ^ < ) J^ ^ _ < ) -^ r /-2- 5ei- c Q-L irge Whee s Ou Isidi 3- Se-f G -Large Whee Is In side Tan. ^ 3° t 7° IS 6 Deg. 12 Deg. Set II. There was a peculiar combination of wheel condi-tions in Set H. The pair composed of wheels 1 and 2 wasmated, whereas 3 and 4 were non-mated, wheel 3 being smallerthan 4 by 54 in. It is also to be noted that the wheels on thesame side of the truck were not mated, that is, wheel 3 was %in. smaller than wheel 2, This peculiar condition no doubt ac-counts for the inconsistent results plotted for line 2 in Fig. points for the 3-deg. and 6-deg. curves do not fall in theirproper relation to the other points, as has been true for otherwheels. The line 2, which represents the relation between de-grees of curvature and frictional resistance, was drawn straightbecause in another feature of the tests conducted, it was found. 17—Comparative Resistance of Sets CTracks. on Different that this relation for all wdieel conditions could be representedby a straight line. Set I. A comparison of wheel sets C and I is of especialimportance, since they were made of the same material, sothat any difference that is evident may be taken as directlydue to a variation in wheel conditions. The wheels in Set Ihad all of the coning removed and the flange ground to anapproximate height of -)4 in. This is clearly shown in Fig. curves plotted in Fig. 18 and the values tabulated inTable 8, serve to emphasize the importance of coning. Withwheels identical in every regard, except that one set has thenormal coning and the other has all coning removed, the wheels with no coning gave from 60friction. TABLE of Sets C aTrack. Tangent. s. per ton, Set I 5. per ton, Set C ResistancResistancLbs. in f to 70 per cent, more 12 Set J. The wheels used in Set J were th
Size: 1486px × 1681px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912
