Researchers and engineers at NASA’s Jet Propulsion Laboratory are on the verge of completing assembly of the Mars Helicopter that is planned to travel on the agency’s next rover mission to the red planet. The autonomous flight unit, which has a shoebox-size fuselage and coaxial rotors 4 ft. (1.21 m) in diameter, is scheduled to be deployed from the Mars 2020 rover after its planned landing in February 2021. The flight vehicle incorporates several design refinements that are ...


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