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Look at your fan: it spins in one direction, and the blades push the air from one air to the other side. In fact, the fan is nothing but a propeller! There are ways to optimize them. The Rotation goes for example clockwise, the leading edge grabs the air and the trailing edge releases it on the other side, and if the leading edge is towards you, then the air ...


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From trying out several alternatives (Fusion 360, Wings 3D, Blender, and others), the closest free offline equivalent to TinkerCAD turned out to be OpenSCAD. It has nowhere near the same level of intuition, but based on info from two tutorials ("OpenSCAD Tutorial - Beginners Quickstart", "OpenSCAD - Model a Bearing in less than ten minutes.&...


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I suspect there may be fewer answers than we expect. Personally free software wise I like FreeCAD but it is not similar to the simple shapes of tinkercad at all and not intuitive. I did know someone who used something from https://www.xyzprinting.com that was very similar to the tinkercad stuff, but eventually ran into limitations and switched to more ...


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