NFAC tests SB>1 DEFIANT military helicopter
A scale model of the Sikorsky-Boeing SB>1 DEFIANT undergoes testing at the AEDC National Full-Scale Aerodynamics Complex at Moffett Field in Mountain View, California. The goal of the wind tunnel test was to validate the aerodynamic performance and flight mechanics of Sikorsky’s X2 Technology aircraft. These configurations, which are being utilized on the SB>1 DEFIANT, include a lift-offset coaxial rotor system, composite fuselage and rear-mounted pusher propulsor that provides increased speed. (Courtesy photo)