Sikorsky releases new video of Defiant X helicopter

U.S. helicopter maker Sikorsky, a unit of¬†Lockheed Martin, has released a new short video showing its concept for Defiant X compound helicopter with two rigid coaxial rotors and a pusher propeller in the tail. The concept was first unveiled by Sikorsky and Boeing on January 25 as their proposed helicopter for the U.S. Army’s Future […]