Sikorsky, Boeing Tout Coaxial Helicopter Concept

Lockheed Martin Corp.’s Sikorsky unit and Boeing are out with a new video touting their concept for an assault and attack variant of the SB>1 Defiant, a large coaxial design it’s pitching for the U.S. Army‘s Joint Multi-Role (JMR) technology demonstrator and Future Vertical Lift (FVL) programs.. (Courtesy video)


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