Sikorsky on 25 May reached 181kt (335km/h) with its X2 technology demonstrator. It finished the third of four phases of flight-testing that will see the dual counter-rotating rotor pusher flying at speeds up to or greater than 250kt this summer.
The twelfth flight test
marked the first time the company attempted to slow the main rotor - by
around 5% - while flying faster to keep the main rotors from approaching
supersonic tip speeds. Continue reading...