Airship configurations

thumb|right|300px|Goodyear GZ-20|The Spirit of Goodyear, one of the iconic [[Goodyear Blimps]] A blimp, (/blɪmp/) less commonly called a non-rigid airship, is an airship (dirigible) without an internal structural framework or a keel. Unlike semi-rigid and rigid airships (e.g. Zeppelins), blimps rely on the pressure of their lifting gas (usually helium, rather than flammable hydrogen) and the strength of the envelope to maintain their shape. Blimps are known for their use in advertising, surveillance, and observation due to their maneuverability, slow speeds and steady flight capabilities.

airship with internal framework to support the envelope

lighter-than-air aircraft

partially aerostatic aircraft

airship

geostationary telecommunication station at an altitude of 20–50 km

hypothetical type of airship that contains a vacuum rather than a lighter-than-air gas