Mechanical Gifs Catalog

Each of the models below is available as a high-quality, laser-cut acrylic model in either kit or fully assembled form. All models come attractively packaged with everything needed to finish the model (even a screwdriver). No special model-assembly skills are needed: the models just screw together in typically 15-20 minutes.

Two-Eccentrics Steam Engine

Two-Eccentrics Steam Engine

from 29.99

This model steam engine uses two "eccentrics" stacked on top of each other to create the out-of-phase movement of the piston and valve (for an explanation of what that means, see my page on the Right Angle Steam Engine). My other steam engine models use a single offset crank arm with the motion taken off in two different directions. But real engines are always made with two separate take-offs (usually one eccentric like these for the valve and a longer crank arm for the piston). So this model is closer to how real engines work. However, it is much more difficult to intuitively see how the timing is created.

This is a high-quality model, made from laser-cut clear and colored acrylic. It will not run on actual steam or compressed air, but you can make it spin by pushing and pulling on the piston with just the right rhythm. The kit includes everything you need, even a mini-screwdriver. Assembly time is around 10-15 minutes. 

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