The Sikorsky-Boeing SB-1 Defiant is the Sikorsky Aircraft and Boeing entry for the United States Army's Future Vertical Lift program, succeeding the Joint Multi-Role initiative.

Sikorsky Aircraft and Boeing are jointly producing a medium-lift-sized demonstrator they named SB 1 Defiant for phase one of the program.

Sikorsky is leading the development of phase one with an aircraft based on their previous Sikorsky X2 design.

Further delays resulted in the first flight slipping past summer 2018.

Dynamic systems like turboshafts, transmission, and rotors were scheduled to be tested at West Palm Beach, Florida, by the end of October 2018, before ground runs in November, then first flight to reach 200 knots within six months.

The first prototype was unveiled in December 2018, and the first flight was pushed to sometime in early 2019.

The first flight took place on 21 March 2019 at Sikorsky West Palm Beach site in Florida.

свернуть