&sq=Qlik&lang=&file=File:Question_book-new.svg){kind=small} | This article needs additional citations for verification. (April 2017) |
The static buoyancy of airships in flight is not constant. It is therefore necessary to control the altitude of an airship by controlling its buoyancy: buoyancy compensation.
| This article needs additional citations for verification. (April 2017) |
The static buoyancy of airships in flight is not constant. It is therefore necessary to control the altitude of an airship by controlling its buoyancy: buoyancy compensation.