. Brake tests; a report of a series of road tests of brakes on passenger equipment cars made at Absecon, New Jersey, in 1913 . Fig. 160. COEFFICIENT OF FRICTION OF BRAKE SHOE,of one shoe showing changes in coefficient of friction, bearing area and temperature. 267 M. P. «79 D ,.l„^ PENNSYLVANIA RAILROAD COMPANY ° PhU^DSLPBLA. BaLTIMORK & WABHOtaTOH Raoaoad Cokfakt NORTaBRM Central Railway CofirAMY WBST JBB«BY Jt SlASBURS Raomoad Cokpamy Sheet test department &R.^ll3:^ _NN^.>^JS» .^]^ ALTooNA. £L2r/3HiS. Fig. 161. COEFFICIENT OF FRICTION OF BRAKE of one shoe showi
. Brake tests; a report of a series of road tests of brakes on passenger equipment cars made at Absecon, New Jersey, in 1913 . Fig. 160. COEFFICIENT OF FRICTION OF BRAKE SHOE,of one shoe showing changes in coefficient of friction, bearing area and temperature. 267 M. P. «79 D ,.l„^ PENNSYLVANIA RAILROAD COMPANY ° PhU^DSLPBLA. BaLTIMORK & WABHOtaTOH Raoaoad Cokfakt NORTaBRM Central Railway CofirAMY WBST JBB«BY Jt SlASBURS Raomoad Cokpamy Sheet test department &R.^ll3:^ _NN^.>^JS» .^]^ ALTooNA. £L2r/3HiS. Fig. 161. COEFFICIENT OF FRICTION OF BRAKE of one shoe showing changes in coefficient of friction, bearing area and temperature. 268 on one brake shoe variations in the results are to be expected and it istherefore imperative that deductions be based on the results of a num-ber of tests. 517. The variation in the results of successive machine tests willof course be greater than in road tests because in the case of a car ortrain an average is obtained from the action of all the brake shoes in-volved. The Effect of Speed on Coefficient of Friction. 518. The results of both road and machine tests on brake shoeshave shown that the coefficient of friction under any .condition of brak-ing power is dependent upon the initial speed, and the coefficient offriction tends to decrease as the speed is increased. This condition canbe expected from the fact that the total energy to be absorbed during agiven stop is always proportional to the square of the initial effect of the h
Size: 1436px × 1739px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidbraketestsre, bookyear1913
