Working collection
Inside the workshop.
Explore new models, take assemblies apart, and discover how their components work together.
Explore our works in progress. Some details and interactions are still being refined.
28 of 28 models
How ball bearings work
Why don’t the balls travel around a bearing at the same speed as the shaft?
One engine. Two different wheel speeds.
How can one engine drive two wheels that turn at different speeds?
How a V12 overlaps twelve engine cycles
How can twelve cylinders take turns supplying power during the same two crankshaft revolutions?
A single-seater’s invisible load
Why does aerodynamic downforce grow so quickly as a racing car goes faster?
Why water pushes harder at the bottom of a dam
Why is a dam wall usually much thicker at its base?
A hot rock reservoir can drive a power cycle
How can underground heat become electricity without burning fuel?
How an LED makes light
How can a small electric current produce a particular color of light?
Steering with a jet of water
How can a boat turn or reverse without a propeller outside the hull?
Two drill bits, two ways to break rock
What changes when a drill bit uses rolling cones instead of fixed cutters?
Inside a laptop: paths, power, and heat
How do computation, stored data, power, and heat connect inside a laptop?
How a zipper joins two rows of teeth
How does a small slider fasten an entire row of teeth?
Next on the bench.
Requested subjects with no model yet. These are not included in the inventory above.
Trebuchet
How does a falling counterweight turn the arm and sling?
Crossbow
How do the bow, string and release mechanism work together?
Seat-belt retractor
Why does the belt extend slowly but lock during a sudden pull?
Airbag system
How do sensing, inflation and venting work together in a crash?