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ballonet |
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| The ballonet is a zero-porosity internal membrane filled with the inert gas helium. The upper chamber is filled with helium and the lower chamber is a pressurized air compartment, called a ballonet. Classified as a semi-rigid airship, as opposed to a blimp or dirigible, the CargoLifter's exterior structure is supported by an inner "bladder", or ballonet, which maintains the shape and altitude of the airship by increasing or decreasing air pressure. |
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