. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . June, 1922 RAILWAY AND LOCOMOTIVE ENGINEERING 147. stem from that of the cylinder or what is^ the same thing, from the center line of theengine, and it can be laid down on thedrawing from the distance so , the distance of the center of thecylinder from the center of the drivingaxle, will be fixed from the general de-sign of the locomotive, and, then, the posi-tion of the vertical plans, a a, (Fig. 11)for the extreme right hand throw of thelower end / of the lap-and-lead lever,
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . June, 1922 RAILWAY AND LOCOMOTIVE ENGINEERING 147. stem from that of the cylinder or what is^ the same thing, from the center line of theengine, and it can be laid down on thedrawing from the distance so , the distance of the center of thecylinder from the center of the drivingaxle, will be fixed from the general de-sign of the locomotive, and, then, the posi-tion of the vertical plans, a a, (Fig. 11)for the extreme right hand throw of thelower end / of the lap-and-lead lever, canbe obtained from the construction of thecylinder and back cylinder head will enable the designer to calculatethe distance of this vertical plane a a fromthe center of the driving wheels and to layit down on the drawing. At a distance,R, to the left of the plane o a, draw astraight line at right angles to the centerline of tiie engine. This will be the centerline or symmetrical axis of the lap-and-lead lever, and will also pass through thegeometrical location of point G on thelap-and-lead lever when the piston is ateither end of its
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