Sikorsky Aircraft and Boeing are jointly producing a medium-lift-sized demonstrator they named SB>1 Defiant"Sikorsky, Boeing Selected to Build Technology Demonstrator for Future Vertical Lift SB>1 Defiant expected to fly in 2017". Sikorsky press release, 12 August 2014. Archive (also widely known as "SB-1") for phase one of the program. Originally planned to fly in late 2017, its first flight was delayed in April 2017 to early 2018. Once flight testing begins, the aircraft will be evaluated by the Army for further development.Boeing and Sikorsky team up on US Army’s JMR – Flightglobal.com, 18 January 2013 Sikorsky is leading the development of phase one with an aircraft based on their previous Sikorsky X2 design.
