Sikorsky is preparing to install redesigned rotor blades on the S-97 Raider helicopter demonstrator in a bid to reduce vibration and drag at high speed. The Raider is being flown to reduce the risk in Sikorsky’s bid for the U.S. Army’s Future Attack Reconnaissance (FARA) Competitive Prototype program. The S-97 coaxial rigid-rotor compound helicopter has reached 207 kt. in level flight and 215 kt. in a shallow dive, but has yet to achieve its design goal of 220 kt. “We ...

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