Failed inventions compilation.
Previously:
1930s family bicycle - photo
Overhead fan for gum-chewing stenographers - GIF
Inflatable coat hanger - GIF
1906 pedaled roller skates - photo and patent
1920s roller skates - GIF
Failed inventions compilation.
Previously:
1930s family bicycle - photo
Overhead fan for gum-chewing stenographers - GIF
Inflatable coat hanger - GIF
1906 pedaled roller skates - photo and patent
1920s roller skates - GIF
New plans added on 11/04: Click here for 2,561 plans for homemade tools.
EnginePaul (May 10, 2023), nova_robotics (May 9, 2023)
The first one is more 'art bike' than invention; I seem to remember seeing it somewhere before. The second is very much like the modern elliptigo https://www.elliptigo.com/, the tiny bikes are still sold today https://www.unicycle.com/udc-mini-bike/ (plus dozens of DIY builds scattered among the internets. )
Here's a lot of bike sail designs
ductape (May 9, 2023)
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