How a Locomotive Steam Engine Works - Illustrated Diagram #1776243 (License: Personal Use)

This educational diagram illustrates the core mechanics of a reciprocating steam engine used in historic locomotives: high-pressure steam enters the cylinder, forcing the piston to move linearly; that motion is converted to rotational force via a connecting rod and crank on the driving wheel. The slide valve controls steam admission and exhaust timing, while the flywheel smooths out power delivery. Arrows indicate steam flow, piston movement, and wheel rotation for clarity.

Used in educational content about railway history, engineering fundamentals, or STEM learning modules; targets students, hobbyists, and history enthusiasts seeking to understand 19th-century propulsion technology.