aerostat definition

  • noun:
    • An aircraft, specially a balloon or dirigible, deriving its raise from buoyancy of surrounding environment as opposed to from aerodynamic motion.
    • An aircraft, like a dirigible or balloon, that derives its lift from buoyancy in the place of from wings or rotors.
    • A moored balloon flown in a semi-permanent way, as a border patrol monitoring balloon affixed at 18,000 foot (~6km).

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