The World's First Ever Vacuum Airship (by Mountain Lake Labs)
Vacuum Airship (rigid container)
A vacuum Airship
Egan Airships: The PLIMP™ Invention
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, the vacuum balloon would be the ultimate expression of displacement lift power.