Lockheed Martin subsidiary Sikorsky has successfully flown an electric-powered, 115-lb (52-kg) autonomous drone that uses ...

The twin prop-rotor prototype, weighing 115lb and powered by batteries, offers stability across all flight regimes.

[Jan] goes on to build a complete full-scale wind turbine that can generate nearly ... and perhaps even pitched blades to control rotor speed, [Jan] plans to focus his efforts into improving ...