ⓘ Sikorsky–Boeing SB-1 Defiant

                                     

ⓘ Sikorsky–Boeing SB-1 Defiant

The Sikorsky–Boeing SB-1 Defiant is the Sikorsky Aircraft and Boeing entry for the United States Armys Future Vertical Lift program, succeeding the Joint Multi-Role initiative. It is a compound helicopter with rigid coaxial rotors, powered by two Honeywell T55s, and made its first flight on 21 March 2019.