Difference between revisions of "Aerostat"

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An '''aerostat''' is a [[lighter than air]] craft including [[balloon (aircraft)|free balloon]]s, [[airship]]s, and [[moored balloon]]s. Such a vehicle is lifted by [[buoyancy]], containing a gas less dense than air within an '''envelope'''.
An '''aerostat''' is a [[lighter than air]] craft including [[balloon (aircraft)|free balloon]]s, [[airship]]s, and [[moored balloon]]s. Such a vehicle is lifted by [[buoyancy]], containing a gas less dense than air within an '''envelope'''.


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In technical usage, the term '''aerostat''' refers only to moored balloons.  However, this article uses the term in its broader sense.
In technical usage, the term '''aerostat''' refers only to moored balloons.  However, this article uses the term in its broader sense.
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Revision as of 16:44, 27 January 2008

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An aerostat is a lighter than air craft including free balloons, airships, and moored balloons. Such a vehicle is lifted by buoyancy, containing a gas less dense than air within an envelope.

The term "aerostat" comes from the fact that buoyancy is technically said to provide "aerostatic" lift in that the force upwards arises without movement through the surrounding air mass. This contrasts with aerodynamic lift which requires the movement of at least some part of the aircraft through the surrounding air mass.

In technical usage, the term aerostat refers only to moored balloons. However, this article uses the term in its broader sense.