Fairey Rotodyne

Eurocopter unveils X3 compound demonstrator
October 26, 2010 - 1:24pm

Eurocopter unveiled a ­compound helicopter demonstrator called the X3 (“x cubed”) designed to cruise at 220 knots–about 50 percent faster than today’s medium twins. The helicopter manufacturer believes it has found a sweet spot at a target speed that should make time savings profitable, and the technology could be incorporated into helicopters in less than a decade.