Ashton’s site devoted to steam locomotive valve gears and
their design, kinematics and distribution problems,
particularly for Walschaerts’ and Stephenson’s gears.
History and help for the smaller gauges. Please read the INTRODUCTION
[HOME] [INTRODUCTION] [PROFILE] [WALSCHAERTS' GEAR] [STEPHENSON'S GEAR] [OTHER GEARS] [MORE CYLINDERS] [MINIATURES] [LEAD STEAM] [SIMULATION] [DOWNLOADS] [VALVE SETTING] [FAQ] [ANIMATION] [ANALYSES] [TRACTION & MARINE]