Building a High Speed Helicopter
12/20/2010
Interview with Jean-Michel Billig 12/21/2010 - "The X3 helo demonstration project began its flight tests on September 6 at the Istres test facility in southern France. The helicopter combines conventional rotary blades with forward positioned turbo prop blades. The X3 is a blend of the Dauphin fuselage, the EC155 main…
