The Sikorsky/Boeing SB-1 Defiant is back flying after a delay caused by “joint creep” identified in the propulsion system testbed gearbox. The Defiant team decided to fix the issue instead of ...
Discover the SB‑1 Defiant story - Sikorsky and Boeing's compound-coaxial helicopter built on X2 technology, reaching over 245 knots and hauling battlefield rockets. Despite test flights, fly‑by‑wire ...
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