This idea was first proposed centuries ago, in 1670, but wasn’t feasible until nowadays! Currently there is no Vacuum chamber aircraft of any kind. The closest to this idea is a hot air/ helium balloon. Since 1900, there were several attempts to build such a floating device, but all failed due to the lack of existence of appropriate materials (both light and strong and flexible enough to successfully withhold such a construct). The sole requirements of a vacuum chamber are 1) a fixed and steady volume and 2) effectively pumping air out without causing the chamber to collapse, along as we extract more mass than the total structure with the inner chambers the structure will float and we have a cost efficient air balloon/
the building blocks of the design are inflatable balloons.
we should talk and share materials and designs that showed stability.