What improved?
A separate condenser let steam cool away from the working cylinder. Keeping the cylinder hot reduced repeated heating and cooling.
THE ENGINE ROOM / 04
Small parts. Big discoveries.
A little steam. A clever machine. Let’s see what makes it move.
ON THE WORKBENCHRotative beam · Separate condenserLate 1700s · Factory power
Explore the steam history timeline
3D MODEL
Keep the cylinder hot. Keep the factory moving.A representative rotative Watt engine; simplified crank and straight-line guide.
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 · Late 1700s · Factory power
THE ENGINE’S STORYKeeping useful heat
Heating and cooling the same cylinder over and over wastes fuel. James Watt found a better way: cool the used steam in a separate vessel, called a condenser. The working cylinder could stay hot. Later engines turned wheels and powered factory machines. Less coal could do more work.
Original, replica or teaching model?
Read the source The Lap engine is a preserved historical reference. Our teaching model uses a simple crank and guide; the Lap engine has sun-and-planet gearing and parallel motion.
Power for many machines
Belts could share one engine’s turning motion with factory machines. The preserved Lap engine is a useful example of this factory story.
A changing working day
Steam power allowed factories to grow away from fast-flowing rivers. Factory work also brought long hours, noise and new hazards. This model uses a simple crank, not the Lap engine’s sun-and-planet gear.
In the archive
Select a photograph to look closer. Captions distinguish originals, replicas and related examples.
The Lap engine at the Science Museum. Its gearing differs from our simplified crank.
Chris Allen · CC BY-SA 2.0Archive record ↗
YOUR NEXT DISCOVERY
Look closer. Have a go. Find out.Think like an engineer.
THE ENGINEER’S CHALLENGE
ENGINEERKeep the factory running
- 1. Learn the job
- 2. Put it in order
- 3. Take the controls
A factory has several machines sharing one engine. More machines need more power. Help the engine keep a steady pace without wasting fuel.
Your goal
Finish three shifts with speed between 95 and 105.
First, discover how the engine works by choosing the steps in order. Then adjust three controls for each round. You can try again, ask for help, or restart at any time.