Recent Blogs
Locomotive Link-motion Valve Gear Explained: How It Works, Parts, Diagram & Cutoff Formula
Locomotive Link-motion Valve Gear explained — how Stephenson and Walschaerts reversing link gears work, with worked cutoff math used in steam locomotive overhauls.
Allen Valve Lift or Toe Mechanism: How the Straight-Link Valve Gear Works with Diagram
Allen valve lift or toe explained — how the linkage adjusts steam admission, why locomotive engineers use it, and how to set it correctly on...
Allan Straight-link Valve Gear Explained: How It Works, Parts, Diagram and Uses
Allan straight-link valve gear explained — how the symmetric link reverses steam locomotive valves, design math, tolerances, and worked example for restorers.