NASA's Mars helicopter passes flight tests video - CNET
A vacuum chamber re-created atmosphere and gravity similar to the Red Planet. The helicopter hovered 2 inches off the ground, satisfying test flight requirements for its Mars 2020 mission.
from CNET https://ift.tt/2WE5aTX
via Mobiles
from CNET https://ift.tt/2WE5aTX
via Mobiles
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