Lockheed Martin subsidiary Sikorsky has successfully flown an electric-powered, 115-lb (52-kg) autonomous drone that uses what it calls a "rotor blown wing" to fly like both a helicopter and an ...

At least, we thought that was the pinnacle. Because now rotary specialist Rob Dahm has his hands on the Y-configuration 12-rotor,15.7-liter, tri-turbo engine built for a speedboat, but never used ...