SB> 1 Defiant made its first flight on March 21, 2019 at the Sikorsky site in West Palm Beach, Florida. This aircraft, developed jointly by Sikorsky and Boeing, aims to respond to the next generation of helicopters that the US Army wants to acquire as part of the Future Vertical Lift program. With its two coaxial main rotors and its rear propeller, derived directly from the Sikorsky X-2 technology, the Defiant is, according to Dan Spoor, vice president Sikorsky Future Vertical Lift, “designed to fly at nearly twice the speed conventional and has twice the range of autonomy from today’s helicopters. “