NASA recently released concept images of its first all-electric X-plane, the X-57 Maxell, in its final configuration. The plane’s high-lift motors will deactivate during cruise mode, and its propeller blades will fold into the nacelles to reduce drag. The motors will reactivate and use centrifugal force to spin the blades back out to provide necessary lift for landing.
NASA's All-Electric Plane
May 6, 2020