Re: Martian Airplanes?
The atmospheric pressure at the surface of Mars varies significantly, but can be approximated as .01 that of Earth. The surface gravity is about 0.38 that of Earth.
If the area of wing needed is inversely proportional to the atmospheric pressure and directly proportional to the gravity, you would need a wing 38 times as large on Mars as on Earth, to lift the same mass of engine, cabin, controls, etc. (note, MASS, not weight).
Such a wing is, itself, of significant mass, so that starting from a given terrestrial configuration, you not only need a larger wing, you now need to lift that more massive wing, which makes the wing even bigger, which is yet more mass to lift, needing a bigger wing, which means....
Thus, the design starts "chasing its own tail." I don't know if one can eventually "catch up," or if it simply isn't possible. I'd bet it can't be done.
Mind you, putting wings for control on, essentially, a rocket, might very well be workable.