Rotorcraft
Sikorsky Defiant Moves Closer To First Flight
Sikorsky's compound SB-1 helicopter prototype gains FAA registration numbers

Sikorsky and development partner Boeing inched closer to the first flight of the SB-1 “Defiant” compound helicopter prototype this week, receiving FAA registration number N100FV and officially designating it the “S-100,” serial number MSN 0001. The SB-1 is Sikorsky’s entry into the Pentagon’s Future Vertical Lift (FVL) competition, a program that ultimately could result in deliveries of as many as 4,000 aircraft by 2030 under a contract potentially worth $100 billion and including significant foreign military sales.