>>1401636
In notables: NASA Sending Chopper to Mars
Not a sciencefag. so could someone- anyone- please explain to me how a helicopter that works against gravity by forcing air under its propellers to lift it against the forces of gravity- in the Mars atmosphere?
I can't wrap my head around how a copter can function in zero gravity.
Can't imagine how it gets air under it where no 'air' exists.
Anyone?