Two-wheeled skateboard

The Byceboard is a two-wheeled skateboard that has an articulated wheel in the front and a fixed one on the back. When the Byceboard tilts to one side the articulated wheel reacts by turning towards that side, making the whole device turn. When the device turns the person and the Byceboard go back to a horizontal position. This setup adds stability to the whole system and allows the person riding it to steer it by moving from side to side. But the added stability doesn’t make the system very robust since you have to be going at a certain speed in order to have positive stability. So overall the system is still unstable; but it works well enough. Some trial runs by my cousin are shown below:

The bad news is that while I was reading Wired magazine I found out that a skateboard company already came up with this idea. I find this a very interesting device since it adds stability to a system by just mechanical means instead of using computers. The best example for this are the fins in a model rocket where the fins actually make the system stable.