It's made from cool materials like carbon fiber and aircraft - grade aluminum, and boasts a 20 mile range and a top speed of 15 miles per hour. (heavy.com)
We just wanted to geek out on cool materials. (newscientist.com)
By contrast, in a convection zone the energy is transported by bulk movement of plasma, with hotter material rising and cooler material descending. (newworldencyclopedia.org)