Locomotive Engine Running and Management

by Angus Sinclair

VALVE-MOTION OF A FAST PASSENGER LOCOMOTIVE.

Reducing the travel of the valve by drawing the reverse-lever towards the center of the quadrant, and consequently the link-block towards the middle of the link-slot, not only hastens the steam cut-off, but it accelerates in a like degree every other event of steam distribution throughout the stroke. To explain this point, let us take the motion of a well-designed engine in actual service, which has done good economical work on fast train running. The valve-travel is five inches, lap one inch, no inside lap, lead in full gear 1/16 inch, point of suspension 9/16 inch back of center of link.