The steam locomotive that won the Rainhill Trials was Rocket.
Designed by George and Robert Stephenson and built by Robert Stephenson and Company, Rocket competed in the 1829 trials near Rainhill, Lancashire. The contest was organized by the Liverpool and Manchester Railway to determine which locomotive design was reliable enough for regular passenger and freight service.
Rocket was the only entrant to complete the required trials successfully. It averaged about 12 miles per hour while hauling a load of roughly 13 tons and reached a top speed of 30 miles per hour. Its performance earned the Stephensons the £500 prize and a contract to supply locomotives for the new railway.
Novelty was faster in brief bursts and became a crowd favorite, but a damaged boiler pipe forced its withdrawal. Sans Pareil also failed to complete the contest. Rocket's success helped establish the basic locomotive layout—especially its multi-tube boiler—as a model for later steam engines.