Recent Blogs
Shifting Eccentric Mechanism Explained: Valve Gear Parts, How It Works, Diagram & Calculator
Shifting eccentric explained — how slide-valve engines reverse direction and cut off steam by sliding the eccentric on the crankshaft. Used in mill engines and...
Joy's Valve Gear Mechanism Explained: How It Works, Parts, Diagram, Formula and Uses
Joy's Valve Gear explained — radial valve gear without eccentrics, used on LNWR locomotives and marine engines. Geometry, formula, worked example, trade-offs.
Gooch Valve Gear Mechanism Explained: How It Works, Diagram, Parts, Formula and Uses
Gooch valve gear explained — how Daniel Gooch's stationary-link reversing gear controls steam admission in locomotives, with formula, worked example and tradeoffs.
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.
Walschaerts Valve Gear Mechanism Explained: How It Works, Parts, Diagram & Uses
Walschaerts Valve Gear explained — how the linkage controls steam admission, cutoff, and reverse on locomotives, with formulas, tolerances, and worked examples.