. Railway mechanical engineer . on 7,500 6,000 mh I of the iictal i: wh left I. ch is the a sub only a very thin wel) in tinworked part of the steel, <stantial and solid vvci). It must not be thouHht that this style of rod is any heavierthan the slimmer and wider one, because each has the samestress and therefurc the same cross-sectional area. As a strutin coinprcssioii. where the ratio of length to the least radius of 1gyration — docs not exceed 160. actual tests on full si/ed Psections have shown that this type of rod is just as strong as the to the driving wheel desi
. Railway mechanical engineer . on 7,500 6,000 mh I of the iictal i: wh left I. ch is the a sub only a very thin wel) in tinworked part of the steel, <stantial and solid vvci). It must not be thouHht that this style of rod is any heavierthan the slimmer and wider one, because each has the samestress and therefurc the same cross-sectional area. As a strutin coinprcssioii. where the ratio of length to the least radius of 1gyration — docs not exceed 160. actual tests on full si/ed Psections have shown that this type of rod is just as strong as the to the driving wheel design—the style of rim, the spokes andhub—sonic weight was taken off the imbalanced hub portion anda few pounds added to the coiniterbalance where this weightcounted most. Reference has been made to the difficulty of keeping the bear-ing pressure low on large crank pins on account of the peri-phery siJied of the brass increasing as the diameter of the pin isincreased, and in this connection lig. 29 show^ anoth. r ■;ty1c of. Fig. 30—Running Geai of PhiladelphiaLocomotive main stub and brass. The tbesaijeake & r)hio had great iliffi-culty in keeping the main pins cool on their Mountain type loco-motives, which originally had the usual strap and wedge new stub is solid, with no key adjustment and a steel bush-ing is pressed into the solid end and held by steel plugs at thetop and bottom. The brass is a loose bronze ring and revolveson the pin and in the bushing; this reduces ihc velocity of the /S2 ■^-7rSi—-M , 3 3 3 ? r I ^ 4i i 4?*: Brome Bi/shlna to Turn Freelu int,.o I ~^^-T,~-^~~f-^^ySfedBu5h!naandonCn3nkPin. V ! I I \Li?; I ; ^ Inside I \ Moles §c/rs
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
