Based on recent air-flight events, I got an idea. Is there any way to make a plane or drone fall down slower when all power is shut off?

I assume keeping the propellers spinning with low friction would reduce impact if falling straight down.
What if there was some redesign on a plane in which the bottom is "hollow" and air being pushed into that hollow force would create some sort up upthrust?
Anyone ever thought of this or know some sort of design parameters for this? I will 3D print suggested models and ideas