Is The Navy Bringing Back The Autogyro?

It's a drone on a leash. Autogyros are the duck-billed platypuses of the aviation world. They look like helicopters, operate on the same principles as airplanes, and can be pulled like a kite. And if L-3's new Valkyrie drone is any indication, there's a chance autogyros might join the U.S. Navy. First, the principle of the machine: While an autogyro looks most like a helicopter, the rotor is instead unpowered, and provides lift much like the wings of an airplane--by being pulled through the air,...