CoAxial Helo Heralds Development Of Exciting New Rotorcraft We knew it was close... and now it's real. Sikorsky has confirmed the successful first flight of the S-97 RAIDER helicopter, a rigid coaxial rotor prototype designed to demonstrate a combination of maneuverability, hover ability, range, speed, endurance and survivability. The first flight was conducted at Sikorsky’s Development Flight Center (DFC) where the two-prototype RAIDER helicopter test program is based.
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