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This trapezoidal truss design has the interesting property that if you join the segments end to corresponding end, you get a curved arch, but if you join opposite ends, you get a straight section. This lets you build a variety of curved…
Copies of this 3D cube shape can fit together to fill all of space without ever repeating, by forming exponentially larger and larger "chair" shapes. This sort of shape is known as an "einstein tile" (from "one stone", not Dr. Einstein!).…
My trailer jack's handle vanished during a short drive, presumably lost its one bolt and bounced off down the highway. This version uses two steel bolts, one through the jack's screw and the other as a handle, and uses nuts with nylon…
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