The Eurocopter X3 hybrid made its record-breaking speed run just 10 days before the opening of the Paris Air Show, so it was not surprising that the EADS company brought both the unique aircraft and its crew to the Le Bourget biennial event. On June 7, the X3 flew at 255 knots in level flight and 263 knots in a dive, besting the previous record set by the Sikorsky X2 in September 2010 (250 knots level and 260 knots in descent).
Eurocopter announced today that its X3 compound helicopter demonstrator flew at 255 knots in level flight on Friday near Istres in southeast France. Also part of the unofficial speed record was a descent at 263 knots. These speeds are just a few knots higher than those the Sikorsky X2 semi-compound demonstrator attained in 2010.