Sikorsky-Boeing SB1 DEFIANT Test Flight
Sikorsky-Boeing SB1 DEFIANT is conducting higher speed and forward moving test flights for the US Army.
What’s Boeing’s latest innovation? Subscr...
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![Sikorsky Boeing - SB1 Defiant Future Vertical Lift Helicopter Simulation [1080p]](https://sun9-72.userapi.com/GE7yFYywz0ILu6ZEFa3r5b16L1AloI5avuIM_g/Ou0usZmS-Wg.jpg)
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