Rotorcraft XR-11
The Rotorcraft XR-11, known by the company as the X-2 Dragonfly, was an American two-seat lightweight helicopter built in the 1940s for evaluation by the United States Air Force by the Rotorcraft Corporation of Glendale, California. Design and development. The XR-11 was a powered by a Continental A100 piston engine driving two three-bladed contra-rotating rotors. Only one was built and first flown in 1947, it was re-designated the XH-11 in 1948, the project was later cancelled.