. American engineer and railroad journal . nted as taken from one of the engines before it left theSchenectady Locomotive Works. Because of the remarkableuniformity of the cut-off measurements, which are very nearlyperfect, the subject was investigated and by permission of thebuilders of the engines and also of Mr. A. M. Waitt, Superin-tendent of Motive Power of the road, a diagram of the detailmeasurements of the valve motion are now presented. These The following dimensions may also be convenient here: Cylinders 21 by 2(J ins. Eccentric throw 5% ins. Valve travel 6 ins. Center of cylinder ab
. American engineer and railroad journal . nted as taken from one of the engines before it left theSchenectady Locomotive Works. Because of the remarkableuniformity of the cut-off measurements, which are very nearlyperfect, the subject was investigated and by permission of thebuilders of the engines and also of Mr. A. M. Waitt, Superin-tendent of Motive Power of the road, a diagram of the detailmeasurements of the valve motion are now presented. These The following dimensions may also be convenient here: Cylinders 21 by 2(J ins. Eccentric throw 5% ins. Valve travel 6 ins. Center of cylinder above center of axle 2 ins. Saddle pin offset 1 in. Steam lap 1 in. Exhaust clearance , in. Length of main rod 10 ft. 6 Admission Internal Width of port 1% in. Motion hangers Vertical Radius of link 60 ins. In looking up the history of this valve motion we find thatit originated with Mr. G. R. Henderson, while Mechanical En-gineer of the Norfolk & Western Railway. It was applied byhim, very successfully, to a locomotive on that road and. Diagram of Valve Motion— Central Atlantic Type York Central & Hudson R ver Railroad. [Xot to scale.) dimensions are believed to be sufficient to enable anyone to setup the valve motion on a model for the purpose of investigat-ing the subject for himself. It is well known to be difficult to obtain such results as theseand to get approximately equal valve opening, front and back,at full stroke or up to 15 or 16 ins. cut-off. As a rule the cut-off will not be as uniform as this table shows from full stroke was developed into the design of the Northwestern type lo-comotives built at Schenectady last year for the Chicago &Northwestern Railway and illustrated in our August numberof last year, page 237. Mr. Henderson, until very recently As-sistant Superintendent of Motive Power of the Chicago & North-western, reports that the valve motion of these engines is verysatisfactory, which is substantiated by the following tables of 240 AMERIC
Size: 2486px × 1005px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
