The retro-friction toy car is an incredible piece of engineering! It's sometimes called a “wind-up” toy car. This video covers the specifics of the mechanism: the motor frame, the 5 gears and the ...

[Azpaca] purchased a fun little toy car from Tamiya, only… there was a ... Thus, it was time to 3D-print a better chassis that could actually get through it! The problem was quite obvious.