Lots More InformationRelated HowStuffWorks ArticlesHow Airplanes WorkHow Helicopters WorkHow CargoLifter's Airship Will WorkHow Helium Balloons WorkHow do they make helium?Would a balloon filled with vacuum instead of helium float?How many regular-sized helium-filled balloons would it take to lift someone?More Great LinksThe Goodyear BlimpMetLife BlimpAmerican Blimp Corporation: How Airships FlyAirship and Blimp Resources