. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . e an endlessstrip of paper 18 ins. wide is drawn,and upon it a continuous record of thetest is made. The paper is driven by-direct connection with one of the sup-porting wheels upon which the loco-motive drivers rest. The speed reduc-tion is so arranged that when the loco-motive under test travels one mile on June, nj07. RAILWAY AND LOCOMOTIVIL ENGINEERING 275 the supporting wheels the paper ins., giving a scale of lOO ft. tothe inch upon the diagram, A (latumpen marks a continuous
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . e an endlessstrip of paper 18 ins. wide is drawn,and upon it a continuous record of thetest is made. The paper is driven by-direct connection with one of the sup-porting wheels upon which the loco-motive drivers rest. The speed reduc-tion is so arranged that when the loco-motive under test travels one mile on June, nj07. RAILWAY AND LOCOMOTIVIL ENGINEERING 275 the supporting wheels the paper ins., giving a scale of lOO ft. tothe inch upon the diagram, A (latumpen marks a continuous slraighl lineupon the paper. The traction recorditig ])en movesacross the paper perpendicular to thedatum line, its distance from the datumline being dependent upon the force a jog in its line every time the inte-grator measures one square inch. Theremaining electrically operated pensarc used for recording such features oftl;e lest as taking indicator cards, whole plant has heen carefully de-signed and is well equipped in every way,and mucli valuable information will hegained by the \IKW 111 Ii:\XSVI^\-\M-\ TESTING \NT. transmitted by the drawbar from thelocomotive. The maximum travel ofthis pen away from the datum line iseight inches. Two sets of springs areprovided. With the heaviest set theeight inch movement of the tractionpen corresponds to a load of 80,000lbs. upon the drawbar, the of the dynamometer. Withthe other set of springs the eight inchmotion of the traction pen correspondstc a pull of 40,000 lbs. upon the draw-bar, and with all the flat springs re-moved, the eight inch motion corre-sponds to a 16,000 lb. load upon thedrawbar. The total motion of thedrawbar to give the eight inch move-ment to the recording mechanism is1-25 of an inch. The multiplication ofthe recording and weighing mechan-ism is therefore 200 to i. An integra-tor is provided and attached to thetraction recording mechanism, so thatthe foot-po
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
