In the movies and cartoons (and presumably the comics), one of the major advantages Iron Man has is flight. Most superheroes have it, actually. Even the Mark 1 prototype (in the movie) has a limited ability of flight that Tony uses to escape.
Tony is able to get away with anything by being able to get away from anything. Air superiority allows him to hold off the government from forcing to reveal his tech, and it's also a major contributing ability when he fights villains.
How effective would an Iron Man suit without flight be? Are there any episodes, movies, or comics where Iron Man doesn't have flight capabilities? Any where he loses them temporarily or permanently?