I've been preoccupied with Robocon, the International Design Contest which this year is hosted at MIT. But somewhere in the past week we found some time to complete the rolling chassis on tinyKart. The tires came in, so this was the moment of truth for the custom aluminum frame. And as you can see in the video above, it actually rolls (past the unfortunately copper-deficient LOLrioKart). The chassis itself weighs only about 40lbs, so we were quite happy to see it handle the full weight of a driver and not simple bend in half.
The tires are 8"x2" pneumatics with tubes from ElectricScooterParts. They're certainly not for racing, but they are remarkably light, which is the point in this case. They are high-pressure (70-80psi) so they roll very well, though the ride may be a little rough outside. We will probably run them closer to 60psi since we have four points of contact with the ground and they're normally used on scooters with two.
Other than that, the only addition here is a Vise-Grip steering wheel. That will soon be replaced with a custom job. One interesting thing about tinyKart will be the hand-based throttle and brake (no pedals). More on that to come when we install them, but I think it will be incredibly fun to drive.
A few more pictures of the substantially completed chassis:
|Slackermann steering geometry at work.|
|More 80/20 for the steering column support.|
|Thin as a razor blade...|
|Convenient storage position.|
Next up: Electrons. Thousands of them. Actually thousands of billions of billions of them...per second.