. Railway mechanical engineer . c packed gears made 249 miles for each cu. ft. per economical condition. They undoubtedly perform the in-tended functions in a very satisfactory manner, but only atthe cost of compressed air. This cost is much greater thanit need be, and the problem of reducing it to a minimumresolves itself into the determination of how much mainte-nance expense will be warranted. The test figures show awide field for profitable investment in maintenance, and bet-ter maintenance will carry with it other Ijetterments, such asless wear and tear, more perfect performance, and grea
. Railway mechanical engineer . c packed gears made 249 miles for each cu. ft. per economical condition. They undoubtedly perform the in-tended functions in a very satisfactory manner, but only atthe cost of compressed air. This cost is much greater thanit need be, and the problem of reducing it to a minimumresolves itself into the determination of how much mainte-nance expense will be warranted. The test figures show awide field for profitable investment in maintenance, and bet-ter maintenance will carry with it other Ijetterments, such asless wear and tear, more perfect performance, and greaterreliability, all of which will tend to turn to raise the effi-ciency of locomotive operation. The proposed condemninglimits will serve to reduce the waste at least one-half, andwhen this saving is accomplished the association will be ina position to scale the limits downward on a scientific basis^ 8l C C COMPRESSOR LOCOMOTIVE B MAXIMUM LEAKER LOCOMOTIVE P MINIMUM LEAKER LOCOMOTIVE C MAXIMUM LEAKER REPAIRED — 5-A COMPRESSOR. nCOMPBESSOfi 9i COMPRESSOR TIME IN HOURS Fig. 2—Air Consumption Curves for Power Reverse Gears on Freight Locomotives in Road Service min. leakage developed the metallic packed gears made 2,491miles, a ratio of just 10 to 1 in favor of metallic number of gears tested, however, is not sufficient to war-rant final conclusions. The Field for Profitable MaintenanceThe general aspect of all the test results indicates thatthe air operated auxiliary devices are in a more or less un- laecause it will then have available actual maintenance costfigures. The committee fully realized the importance of attackingthis subject on a cost basis, but certain necessary servicefactors remain to be determined in a more accurate and re-liable manner before such comparisons could be justified. Aknowledge of maintenance costs would also be necessary toa complete analysis of the costs involved. Table V—Summary of Reverse Gear Running Tests(Leakage based on 100 lb
Size: 1955px × 1278px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
