Locomotion No. 1 was built by Robert Stephenson & Co. for the Stockton & Darlington Railway and hauled the celebrated opening train on September 27, 1825.
The locomotive was associated strongly with George Stephenson, the railway’s engineer, while the manufacturing organization was managed by his son Robert.
Locomotion used a vertical-cylinder arrangement driving the wheels through rods and represented the practical colliery-locomotive tradition from which the Stephensons had developed their experience.
The opening-day train carried coal, passengers, railway officials, and invited guests over part of the route.
Calling the Stockton & Darlington a modern locomotive-only passenger railway would be false. Horses and stationary engines remained important on the system, and passenger operation developed through mixed practices.
Locomotion entered ordinary freight work after the ceremony rather than existing only as a demonstration engine.
Early railway operation remained hazardous. In 1828 the locomotive suffered a boiler explosion that killed its driver, John Cree.
The engine was repaired and continued in service before eventually being preserved.
The surviving locomotive is an exceptionally important artifact, but restoration and alteration over its long life mean visual details must be dated carefully.
For TransitSatellite, Locomotion should connect the opening-day event with the operating system that followed, showing why one famous train did not by itself define all 1825 railway practice.