It started with [CHORL] making a promise to himself regarding constructing a new combat robot: no spending of money on the new robot. Nested hole saws create concentric holes. Perfect for wheels. Here ...

I built a wheel which can move in two directions. This is an omni-directional wheel, but the little wheels around its circumference are powered so it can also move sideways. How well will a robot ...

The reaction wheel can only exert a force when it accelerates or decelerates, so if we try to balance off centre then the wheel would have to constantly increase in velocity until it reaches its limit ...