File:Railway mechanical engineer (1916) (14761588925).jpg

Identifier: railwaymechanica96newy (find matches)
Title: Railway mechanical engineer
Year: 1916 (1910s)
Authors:
Subjects: Railroad engineering Engineering Railroads Railroad cars
Publisher: New York, N.Y. : Simmons-Boardman Pub. Co
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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Slde Elevation and Sectlens of September, 1922 RAILWAY MECHANICAL ENGINEER 499 pressor, feedwater pump, blower, turbo-generator, stoker and to eliminate ever\- pound of unnecessarj weight. Littlelocomotive booster. These accessories at times use more opportunity for reduction was found in the boiler or frames,than 25 per cent of the steam from the boiler. The con- but surprising savings were made in some of the minor de-sumption per unit of work done is quite high and the saving tails. For example, by refinement in design, the foundationby superheating the steam should be relatively large. brake rigging was cut down 1,800 lbs. without sacrificing strength. The use of magnesia laggins; saved several hun- Reduction of Weight and Drnamic Augment dred pounds. One of the reasons for the selection of the Careful attention was given to all the details of design Elvin stoker was its relatively light weight.
Text Appearing After Image:
Michigan Central Mikado Locomotive 500 RAILWAY MECHANICAL ENGINEER Vol. 96, No. 9 To keep down the weight of the locomotive, the axles andmain crank-pins were made hollow and Lima special qualitysteel, which is a chrome-vanadium steel heat treated by an-nealing, was used in main and side rods. Great care wasalso exercised in the design of the reciprocating parts sothat not only was a saving made in the static weights, butit was also possible to reduce the dynamic augment, orpressure at the rail due to excess counterbalance. Table 11indicates the relative dynamic augment of Class H7E, andNo. 8000 at operating speeds of 30, 40 and SO miles perhour. The reduction of 52 per cent in the maximumdynamic augment shows the advantage of the high-qualitysteel used in the running gear. Table II—Dynamic Augment of Class H7E and30m.p.h. 40m.p.h. 50 No. 8000n.p.h. De- WheelsFront . . .Interined); H7E3,4304,0402,0403,.ilO SOOO1,9201,920 80003,4203.4202,6103,300 crease. H7E 8000 per cent 9,520 5,340

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