Precision-engineered double pendulum, machined and assembled in the USA.
Most chaotic systems, like weather and fluid dynamics, are vast and complex. The double pendulum is the opposite: two pivots, fully understood, and still impossible to predict. Spin it twice, as identically as you can; within seconds the outcomes diverge.
Most chaotic systems, like the weather, are complex. This one is two pivots — fully understood, still impossible to predict.
No random elements; it can be written as a formula.
It can be written as a formula.
Infinitesimally small changes produce wildly different results; no two runs are ever the same.
Small changes produce wildly different results.
It never settles into a rhythm. The motion never loops.
It never settles into a rhythm.
Chaos doesn’t require complexity. This is the simplest machine that proves it.
Four parts machined from a single length of 1¾ × ¼ inch aluminum bar. Everything else is stainless catalog hardware.
Four parts machined from a single length of aluminum bar. Everything else is stainless catalog hardware. Design simplified across three generations.
Design simplified across three generations. Six spacer lengths became two, four bearings became three, threaded inserts went, two turned axles became ground shoulder screws.
Complexity must earn its place.
Hardened magnesium-silicon aluminum alloy — brush-finished, machine-edged, counterbored, then colored by two-step electrolytic anodizing. Bearing seats are milled after the finish, to within a hundredth of a millimeter.
Hardened magnesium-silicon aluminum alloy — brush-finished, machine-edged, then colored by two-step electrolytic anodizing. Bearing seats milled after the finish, to within a hundredth of a millimeter.
Each unit is machined, assembled, torqued, and tested in the USA.
Machined, assembled, and tested in the USA.
Satin black aluminum backdrop, a bronze blade that catches the light — the anodized sheen shifts as the day moves. Still most of the time; alive when it catches someone’s attention. At home beside artwork or a chalkboard, it holds a wall the way a small sculpture does.
Satin black aluminum backdrop, a bronze blade that catches the light. Still most of the time; alive when it catches someone’s attention. At home beside artwork or a chalkboard.
Chaotic Pendulums Co was started in 2002. Outside a university physics hall hung a double pendulum, and one engineering student never managed to walk past it — it was mesmerizing. He machined one as a birthday gift for his father, an engineer who had everything and rated most gifts as junk. The gift landed; his father’s friends ordered their own; a small run followed. The pendulums ended up in homes, labs, universities and museums.
Then sourcing got complicated, the student took a job, and production stopped.
Chaotic Pendulums Co was started in 2002 — one student’s hand-machined gift for his engineer father. A small run followed, into homes, labs and museums. Then production stopped.
24 years and three generations later: Mark 3, rebuilt from scratch.
Every unit numbered. No two units will ever move the same way. No two units share a number.
