airship

[technoguy]

An airship is a buoyant aircraft that can be steered and propelled through the air. Unlike aerodynamic craft (e.g. airplanes and helicopters) which stay aloft by moving an airfoil through the air in order to produce lift, aerostatic craft such as airships (and balloons) stay aloft primarily by means of a cavity (usually quite large) filled with a gas of lesser density than the surrounding atmosphere.

[Trinity]

So is a hand-glider used that drank 32 ounces of coke/pop get better lift than a hand glider that didn't eat at all???