. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . No satisfactory explanationof the phenomena was given, but nodoubt was left that the slipping some-times happens, and it was always con-nected with bent pins or axles. Wewould like to hear from our readers con-cerning this. The Development of the Eight-Wheel Connected Engine on the Baltimore & Ohio Railroad. DY J. SNOWDEN BELL. The necessity, under the conditions ofits service, of obtaining increased trac-tive force by increasing the weight oflocomotive engines and distributing itover a great
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . No satisfactory explanationof the phenomena was given, but nodoubt was left that the slipping some-times happens, and it was always con-nected with bent pins or axles. Wewould like to hear from our readers con-cerning this. The Development of the Eight-Wheel Connected Engine on the Baltimore & Ohio Railroad. DY J. SNOWDEN BELL. The necessity, under the conditions ofits service, of obtaining increased trac-tive force by increasing the weight oflocomotive engines and distributing itover a greater number of driving wheels,was recognized at an early date in thehistory of the Baltimore & Ohio R. R , R. R. were of the class designed andbuilt by Ross Winans and familiarlyknown as Mud Diggers. As shownby the report of tlic machinery depart-ment of the road for i8s9. there werethen in service, six of these engines, theBuffalo No. 35. Baltimore No. No. 37. Elk No. 41,Tuscarora No. 45 and Allegheny The writer believes that originalNos. 33 and 34, Hercules and Gladia-. THK MUD DIGGER and except as to a single and unsuccess-fully experimental instance, that of threelocomotives built for the Western R. Massachusetts, from the designs ofRoss Winans, it is probable that engineshaving eight connected driving wheelswere first built for and operated on theBaltimore & Ohio. The first of theseengines which were used on that roadwas built by Ross Winans and wasplaced on the road in 1844, and the first tor, were also mud diggers. No draw-ings of these engines are now extant,but their construction will be readily un-derstood from the accompanying illus-tration which is a reduced reproductionof a photograph of No. 37, taken atMount Clare shops in 1863. The cylinders were 17 inches in diame-ter and 24 stroke, and the main connect-ing rods were coupled to cranks on extending across the frames in the
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