May 28, 2008 - 11:04am

Sikorsky continues to inch toward flying its X2 technology demonstrator coaxial compound helicopter for the first time at its R&D and test facility in Horseheads, N.Y. At press time, the X2 had made three separate “blades-on” ground runs, with a cumulative engine run time of 30 minutes. Data analyzed during the ground run includes the performance of the X2’s belly-mounted active vibration control system.