. Railway mechanical engineer . be broken in just as satisfactorily in this way as ifthe were postponed until their arrival at the homeroad. W. S. S. NURSERY RHYME Gin a lassie meet a laddie, going to the Riiine, Heres a lass would help ye, laddie, Saving Stamps Im )- lassie has a laddie! And I think of mire,But ()// the lads they smile at me when Saviig^ Stamps Im a buvin. —Pioneer Bull-etin. Drafting Modern Locomotives A Study of the Steps Taken in Developing MaximumDraft Efticiency on N. & W. 4-8-2 Type Locomotive BY H. W. CODDINGTONEngineer of Tests, Norfolk & Western, R
. Railway mechanical engineer . be broken in just as satisfactorily in this way as ifthe were postponed until their arrival at the homeroad. W. S. S. NURSERY RHYME Gin a lassie meet a laddie, going to the Riiine, Heres a lass would help ye, laddie, Saving Stamps Im )- lassie has a laddie! And I think of mire,But ()// the lads they smile at me when Saviig^ Stamps Im a buvin. —Pioneer Bull-etin. Drafting Modern Locomotives A Study of the Steps Taken in Developing MaximumDraft Efticiency on N. & W. 4-8-2 Type Locomotive BY H. W. CODDINGTONEngineer of Tests, Norfolk & Western, Roanoke, Va. II* IN compiling the data obtained from the Norfolk &Western 4-8-2 tj^pe drafting tests, they have been ar-ranged to show a ready comparison of the standardnozzles with and witliout bridges, tlie influence of the lengthof the inside extension of the stack, the sizes of nozzles, bothstandard and annular, as well as the diameters of the results as shoiVTi in the tables are the averages of one. Fig. 4—The Seven-Inch Nozzle with a Bridge Originally Used onN. & W. Mountain Type Locomotives or more rans, as indicated by the run numbers in columnNo. 1. In referring to the results of these tests, as presented inthe tables, the items Exhaust pressure, Draft, front endand Draft efficiency will receive the most consideration. r-RunNo,13-lap /fr *! were more uniform and consistent than the least back pres-sure results as taken from the indicator cards. The was indicated directly while least back pressure re-sults could be affected by slight lost motion in indicatorparts, the tracing of the diagrams, and possible error inscaling the least back pressure with a OF STAXD.\RD NOZZLE WITH .-VNTJ ^\•ITHOUTBRIDGE In Table I, group A, attention is directed to the per-formance of the locomotive while equipped with a 7-in. diam-eter standard nozzle operating with and without a design of this standard no?zle
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
