>One other limitation will be creating aerographites that can support themselves with the air inside the material “pumped" out of it (to truly achieve being lighter than air). In practice, getting a real blimp to work will probably be made out of a future version of aerographite or another aerogel that is super strong and light, one that could self support itself without collapsing in on itself if the air between the meshes of nanotubes is pumped out. A partial vacuum will have to be created inside the aerographite structure without crushing the aerogel. This may be the fatal flaw to the idea or at least the next problem to solve (i.e. given that the material is superhydrophobic, maybe a thin shell of water could be put around the aerogel or some similar exotic solution).