There was an unusual visitor at the Oshkosh airshow this year: a roadable aircraft manufactured by PlaneDriven. The PD2 takes a Glasair Sportsman amateur-built airplane and adds a separate 50-hp “drive unit” to the rear of the craft to provide ground power. To put the vehicle into drive mode, the pilot folds the wings, starts the drive unit, and away we go.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.