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I'm not sure what you're talking about with "must maintain lift as descends otherwise it will stall and fall out of the sky"... Wings stall when they exceed th

I'm not sure what you're talking about with "must maintain lift as descends otherwise it will stall and fall out of the sky"... Wings stall when they exceed their critical angle of attack. A descent is inherently a low AoA maneuver. Heck, in pretty much all aircraft of decent performance, they have devices on the wings to help "spoil" the lift of the wings to help the plane descend more quickly. They're sometimes called speed brakes, sometimes called spoilers.

ams6110 8y ago
Right, but you need a certain amount of forward speed relative to descent to maintain that AoA (assuming you want to maintain a fairly gradual, level descent; most passengers would find a steep nose-down descent alarming). If you scrub off all your forward speed by turning your propeller/fan into a generator to charge the batteries, you have to push the nose down to maintain AoA.