Military and Commercial Technology
Saturday, 23 March 2019
Sikorsky-Boeing #SB1 Defiant Completes First Flight - Video
SB1 Defiant
Published on Mar 21, 2019
SB>1 Defiant completing its initial ground test
Sikorsky and Boeing Defiant helicopter first look
Boeing-Sikorsky SB-1 DEFIANT:
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