Recent Blogs
Stephenson Valve Gear Explained: How It Works, Parts, Cutoff Formula and Uses in Steam Locomotives
Stephenson valve gear explained — how the link motion controls steam admission, cutoff, and reverse on locomotives, with worked sizing example and tradeoffs.
Reversing Gear Mechanism: How It Works, Parts, Diagram and Stephenson Link Motion Explained
Learn how Stephenson link motion combines two eccentric inputs. Explore a simplified endpoint interpolation and its limits with an interactive calculator.
Gooch Valve Gear: Moving Link Animation and Valve-Travel Calculator
Follow the two eccentrics, suspended expansion link and lifted radius rod of Gooch valve gear. Explore valve travel with a connected geometric example.
Walschaerts Valve Gear: Linkage Animation and Harmonic Calculator
Explore the principal Walschaerts links and combine ideal eccentric and lead motion components. The calculation does not solve actual valve events or cutoff.