Friday, 1 February 2019

SB>1 Defiant completing its initial ground test

Lockheed Martin
Vertical Magazine

 Lockheed Martin
Published on Jan 31, 2019
Sikorsky-Boeing #SB1 Defiant Begins Ground Runs

Sikorsky and Boeing Defiant helicopter first look

Boeing-Sikorsky SB-1 DEFIANT: Details

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