SB>1 Defiant Breaks Cover
The Sikorsky-Boeing team developing the Defiant tactical/utility transport compound helicopter demonstrator has unveiled the prototype
The SB>1 Defiant employs a rigid coaxial main rotor with an eight-bladed pusher propeller. (photo: Sikorsky)
The SB>1 Defiant employs a rigid coaxial main rotor with an eight-bladed pusher propeller. (photo: Sikorsky)