Prototype retires: Military 'Raider' version forthcoming
The (ahem) revolutionary X2 prototype copter, which can fly much faster than a normal helicopter but still make vertical landings and takeoffs, has made its last flight. Manufacturer Sikorsky now plans to produce an S-97 military version of the speedy chopper for sale to the US Army.?
Source: http://go.theregister.com/feed/www.theregister.co.uk/2011/07/19/x2_final_flight/
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