The Sikorsky-Boeing SB-1 Defiant is a compound helicopter being developed by Sikorsky Aircraft and Boeing for the United States Army's Future Vertical Lift program.
Previously:
Bell V-280 Valor tiltrotor aircraft - photo and video
Sikorsky H-2 coaxial rotor helicopter - photo
Bell Boeing V-22 Osprey unfolding - GIF and photos
Last edited by Jon; Jan 6, 2020 at 10:55 PM.
New plans added on 11/20: Click here for 2,589 plans for homemade tools.
baja (Jan 8, 2020), desbromilow (Jan 14, 2021), Duke_of_URL (Feb 10, 2020), Rangi (Jan 7, 2020), Seedtick (Jan 7, 2020)
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