A hot air balloon requires a great deal of fuel to keep it aloft, so that you can't fly it even for one day. A gas balloon, which usually uses helium, has the problem that the helium cools at night when the sun is not on it, and you have to throw ballast overboard to keep it from going to the surface.
Steve FossettThis is a Solo Flight, but I want aviation enthusiasts and adventurers everywhere to join me in the endeavour.
Steve FossettPeople often assume I assume I am a thrill seeker, but I am not. I do not enjoy roller coasters, and you won't find me bungee-jumping. ... It is a disadvantage that my pursuits are inherently dangerous. A large part of my effort is to reduce risk.
Steve Fossett