Bill Fell, principle test pilot for Sikorsky, a Lockheed Martin Company, with a walkaround of the Sikorsky-Boeing SB-1 Defiant helicopter at the Association of the United States Army’s 2021 conference and tradeshow in Washington, DC. The novel aircraft, with two coaxial rotor blades and a single pusher propeller, is competing for the US Army’s Future Long-Range Assault Aircraft (FLRAA) contract.

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