A vacuum airship, also known as a vacuum balloon, is a hypothetical airship that is evacuated rather than filled with a lighter-than-air gas such as hydrogen or helium. First proposed by Italian Jesuit priest Francesco Lana de Terzi in 1670,[1] the vacuum balloon would be the ultimate expression of lifting power per volume displaced. (Also called "FLanar", combination of F. Lana and the Portuguese word "flanar," which means wandering.[2])
- ^ "Francesco Lana-Terzi, S.J. (1631–1687); The Father of Aeronautics". Archived from the original on 24 April 2021. Retrieved 13 November 2009.
- ^ Cite error: The named reference
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