Boeing-Sikorsky Team Tests SB-1 Defiant Helicopter in Preparation for Maiden Flight
Boeing and Lockheed Martin’s Sikorsky subsidiary have begun testing the SB-1 Defiant coaxial helicopter in preparation for its initial flight as part of the U.S. Army’s Joint Multi-Role program, Defense News reported Wednesday. The service has started to evaluate two flight demonstrator aircraft – Defiant and Bell V-280 Valor tiltrotor – through the JMR initiative […] More