The Sikorsky-Boeing SB1 DEFIANT will provide revolutionary speed and range capabilities flying 2x faster and farther while increasing the overall maneuverability needed to accomplish the most demanding missions. Sikorsky-Boeing team conducted the first flight of a prototype of the new SB-1 Defiant modern coaxial helicopter at a West Palm Beach, Florida.
DEFIANT is designed to fly at nearly twice the speed and has twice the range of conventional helicopters while retaining the very best, if not better, low-speed and hover performance of conventional helicopters.
SB-1 is equipped with X2 rigid co-axial rotor system technology, which was tested aboard the X2 and S-97 Raider aircraft. Each rotor of the twin co-axial rotor system will revolve in opposite direction and will reduce the net torque of the other rotor in real-time.
A new engine, the future affordable turbine engine (FATE), is to meet the range requirement of 424 km.Compared to conventional helicopters, the counter-rotating coaxial main rotors and pusher propeller offer a 185 km/h speed increase, a 60% combat radius extension, and 50% better performance in high-hot hover performance.