U.S. Army Taps Bell, Sikorsky-Boeing For JMR Next Phase
Sikorsky and Boeing will advance the SB-1 Defiant; Bell’s proposal is the V-280 Valor tiltrotor.
The Sikorsky-Boeing proposal is a compound helicopter design called the SB-1 Defiant. (Image: Sikorsky Aircraft)
The Sikorsky-Boeing proposal is a compound helicopter design called the SB-1 Defiant. (Image: Sikorsky Aircraft)