Eurocopter X3 hybrid helicopter new speed record at 263 knots 487 kmhr French aviation industry

The Eurocopter X3 hybrid helicopter has opened the frontiers of aviation (Read more at http://www.airrecognition.com/index.php?option=com_content&task=view&id=722 ) by attaining a speed milestone of 255 knots (472 km/hr) in level flight on June 7. Several days before this accomplishment, the X3 reached a speed of 263 knots (487 km/hr) during a descent. With these two successes, the X3 surpasses the unofficial speed record for a helicopter.