The Sikorsky-Boeing team provided the first look at the SB>1 Defiant the companies have developed for the U.S. Army’s Joint Multi-Role technology demonstrator program.
The SB>1 Defiant is designed to fly at twice the speed and range of today’s conventional helicopters and offers advanced agility and maneuverability. It will help inform the next generation of military helicopters as part of the U.S. Army’s Future Vertical Lift program.
The helicopter is participating in the Army’s Joint Multi-Role-Medium Technology Demonstrator program. Data from SB>1 Defiant will help the Army develop requirements for new utility helicopters expected to enter service in the early 2030s.
Sikorsky and Boeing have designed the SB>1 Defiant to provide the right combination of speed, lift range that are paramount to both the assault and attack missions while increasing overall maneuverability and agility.
Developed with 85 percent commonality between attack and assault aircraft, the SB>1 Defiant will reduce development and life-cycle costs and ensure minimal disruption or loss of existing rotorcraft expertise. Its open mission systems architecture allows rapid technology and capability insertion to meet evolving requirements and provide the U.S. Military with evolutionary sustainability, affordability readiness for years to come.
The aircraft’s capabilities are largely derived from the X2 rigid co-axial rotor system which has already proven its airworthiness through flights of the X2 and S-97 Raider.
With two coaxial rotors on top that rotate in opposite directions, the extra lift from each rotor’s advancing blade balances out the diminished lift from the opposite side’s retreating blade to eliminate retreating blade stall.
To provide the raw forward thrust for fast flight, the back of the SB>1 Defiant a pusher propulsor, allowing the aircraft to fly twice as fast and twice as far as today’s conventional helicopter while increasing the overall maneuverability and agility required for specific mission objectives.
This additional flight component also provides unique and unmatched maneuverability in all flight regimes including hover, low-speed flight high-speed flight.