Defiant Returns To Flight After Gearbox Delay

Artist's concept of SB-1.
Credit: Sikorsky/Boeing
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 continuing flight test because if the repair was pushed back it would have impacted the schedule...

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