Hoverboard Redux

The "Hoverboard": simultaneously one of the most popular and irritating gadgets to emerge in recent memory. From the misleading name (unlike other hoverboards we've encountered, they don't even hover!) to their tendency to go up in flames, the meteoric emergence of hoverboards is a case study in the dynamics of fads...and patent infringement. But we're not here today to talk about the sociological aspects of this goofy-looking invention--rather, we're discussing the technical ones.A few weeks ag...