A winning idea
Rocket won the Rainhill Trials in 1829. The competition helped a new railway choose locomotives to pull its trains.
THE ENGINE ROOM / 02
Small parts. Big discoveries.
A little steam. A clever machine. Let’s see what makes it move.
ON THE WORKBENCHEarly locomotive · Two cylinders1829 · Before the Victorian era
Explore the steam history timeline
3D MODEL
Meet Rocket. A railway pioneer.An educational model inspired by Rocket in 1829.
Drag to turn · Scroll or pinch to zoom · Right-drag or two-finger drag to panTap a part to discover it
Ready when you are
FROM THE HISTORICAL RECORD · 1829 · Before the Victorian era
THE ENGINE’S STORYA new kind of railway
Rocket won the Rainhill Trials in 1829. Its boiler used many small tubes to transfer heat from hot gases into water, and its two cylinders turned the driving wheels. Faster railway journeys changed how people and goods moved between towns.
Original, replica or teaching model?
Read the source Rocket was altered after 1829. Compare the surviving locomotive with the museum replica of its early arrangement. Our model follows the early layout.
Heat takes many paths
Many small tubes carry hot gases through the boiler. Water surrounds the tubes, so lots of hot surface can help make steam.
Two cylinders, one job
There is a cylinder on each side. Their cranks are a quarter-turn apart, so they do not both reach the ends of their strokes together.
In the archive
Select a photograph to look closer. Captions distinguish originals, replicas and related examples.
The surviving Rocket, after changes to its original layout.
Les Chatfield · CC BY 2.0Archive record ↗
The museum’s sectioned replica shows the earlier arrangement.
HawkeyeUK · CC BY-SA 2.0Archive record ↗
YOUR NEXT DISCOVERY
Look closer. Have a go. Find out.Think like an engineer.
Rocket’s boiler experiment
Change the number of hot-gas tubes. Compare how much heated surface fits inside the boiler, using the same fire.
Experiment 1: fit at least 20 heat-surface units into the same boiler. More small tubes expose more metal to the hot gases.
Heated surface: 12 units. The values are a teaching comparison.
No timer. Try as often as you like. These puzzles explain ideas; they are not instructions for operating a real engine.