. Railroad construction : theory and practice : a textbook for the use of students in colleges and technical schools . Fig. 184.—Two-wheeled Truck—Shifting engine with long wheel-base may be made to pass arounda comparatively sharp curve by omitting the flanges from themiddle drivers and using this form of pilot-truck. As in theprevious case, the eccentricity ofthe center of the truck relativeto the center-pin induces a cen-tripetal force which draws thefront of the engine inward. Butthe swing-truck is not the onlysource of such a force. If theradius-bar pin were placed at 0 (see Fig
. Railroad construction : theory and practice : a textbook for the use of students in colleges and technical schools . Fig. 184.—Two-wheeled Truck—Shifting engine with long wheel-base may be made to pass arounda comparatively sharp curve by omitting the flanges from themiddle drivers and using this form of pilot-truck. As in theprevious case, the eccentricity ofthe center of the truck relativeto the center-pin induces a cen-tripetal force which draws thefront of the engine inward. Butthe swing-truck is not the onlysource of such a force. If theradius-bar pin were placed at 0 (see Fig. 185), the truck-axle would be radial. But the radius-bar is always made some-what shorter than this, and the pin is placed at 0, a considerabledistance ahead of O, thus creating a tendency for the truckto run toward the inner rail and draw the front of the loco-motive in that direction. This tendency will be objectionablygreat if the radius-bar is made too short, as has been practicallydemonstrated in cases when the radius-bar has been subse-quently lengthened with a resulting improvement in the runningof t
Size: 2440px × 1024px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1900, bookdecade1900, bookpublishernewyorkjwiley
