FreeCAD: 3D Printed Rubber Band Racer

Описание: download:
https://www.thingiverse.com/thing:561...

Rubber Band Racer. After making and breaking a couple of these, I wanted to make one which wouldn't break. And this led to being able to wind as much torque as possible into the car, the first thing to break will be the elastic. You can feel when the elastic band is reaching it's elastic limits.
The four 1/4" dowels are: 230mm long, and the 1/4" axle dowel is 80mm. The pins are 1" finishing nails, they all could be cut in half.
I had previously assembled this model.
When assembling: test the dowel and hole fit and drill the pin holes after you've fit the axle, hook, tail end and rear wheels together, that way the part acts as the drill jig. The rest is friction fit.
Try to set the tail hook as centered and perpendicular to the axle as possible, this will help the car run straight. Drill all the pins holes so the pins stay in, can be done with a gun and extension or with a small hand drill.
The download STL's are slightly different from the CAD recording, the front end is 2 parts now. Also with STL's is the native FreeCAD file (.FCstd) if you'd like to modify the model.
It goes pretty good, that's about 28' in the video, I think it could go 40 or 50'.

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