Wow at last we can have our flying cars that don't need fuel... Just kidding.

Can a minimally powered aircraft on mars or venus do this without spending a dime on fuel or panels for flight? That would be a cool technology demonstration getting the whole world shocked. And we could throw all kinds of exotic material like carbon fiber and thin strong foils and kites coz getting these beasts there would be way more costlier than building them. I see very interesting short term future possibilities for this. Maybe even an X-Prize for this would help.