Originally Posted by Dave Jackson
316 mph is nothing. This helicopter flew so fast that its rotor blew off.
Sikorsky S-72 Rotor System Research Aircraft
However, it is claimed that the SNCAC NC 2001 had retractable landing gear and a cruising speed of 245 km/hr.
Surely not the machine in the photograph? Don't see how that gear retracts...
Mart