Eurocopter Unveils X3; Competes With Sikorsky’s X2
Last week, Eurocopter took the wraps off its developmental X3 helicopter, with a claimed top speed of 220 knots. The “speed barrier” for conventionally designed rotorcraft has always been defined by the speed differential between the advancing rotor blade(s) set off by that of the retreating blade(s). The faster the aircraft flies, the greater the […]