Although helicopters were developed and built within the first half century of flight, it was not until 1942 that a helicopter designer finally saw his idea into fruition, taking to the skies in his Sikorsky R4. In all, Sikorsky would...

Lockheed and Boeing released details of the Defiant X, a long-range assault helicopter concept designed to replace the U.S. Army’s UH-60 Black Hawk