Cyclopedia of locomotive engineering, with examination questions and answers; a practical manual on the construction care and management of modern locomotives . 762 LOCOMOTIVE ENGINEERING. WALSCHAERT VALVE GEAR 763 points R, R\ R2, R3, etc. On OH we have the full travelvalve circle and OL the lap or radius of the lap circle,the latter being the same for all cut-offs, as well as thelead, the radii H1, H2, H3, etc., of the eccentric circles ordiameters of the corresponding valve circles terminateon a line HI drawn perpendicular to AB, and at a dis-tance from O equal to that of lap and lead. When
Cyclopedia of locomotive engineering, with examination questions and answers; a practical manual on the construction care and management of modern locomotives . 762 LOCOMOTIVE ENGINEERING. WALSCHAERT VALVE GEAR 763 points R, R\ R2, R3, etc. On OH we have the full travelvalve circle and OL the lap or radius of the lap circle,the latter being the same for all cut-offs, as well as thelead, the radii H1, H2, H3, etc., of the eccentric circles ordiameters of the corresponding valve circles terminateon a line HI drawn perpendicular to AB, and at a dis-tance from O equal to that of lap and lead. When the reverse lever is in its center position thediameter of the valve circle falls on the line AB, and isequal to^fep and lead. Continuing in back position wehave the same method repeated and OI would be the fulltravel valve circle diameter, or the same as the eccentricradius for the valve travel. Any desired cut-off positionmay be laid out in the same manner as that in Fig. 336,which shows all the valve movements for a completerevolution of the axle. The movements are in actual practice not so regularas the circles indicate, as it is impracticable to obtain thevarious loci in thei
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectlocomot, bookyear1916
