C-Sword
Noob
The current prototype of the Hendo – the company’s 18th – will hover about 3cm off the ground carrying up to 140kg (about two people) for around 15 minutes. It uses a strong magnetic field to repulse a ground-based material and float in the same way maglev trains operate. That means that Hendo will only float over floors made of non-ferrous metals such as copper or aluminium; this is no skateboard for flying down to the local supermarket, or around the town square hoiked to the back of a pickup truck.
http://www.theguardian.com/technology/2014/oct/21/marty-mcfly-hoverboard-available-on-kickstarter