How to make HIGH Speed knex cars
An hour ago I had an idea to speed up a knex motor, or really make a new one, I tested it, and it worked, but it was not good enough. So I upgraded it. It was originally attaching ann electric screw driver to a piece of knex, then making a gearbox to attach it into 2 sideways ones like on the motor.
But it was not good enough!
I used an electric drill!
Use tape to keep it turned on.