SAE/TP 2010-01-1784 (PDF) Vacua Buoyancy Is Provided by a Vacuum Bag Comprising a Vacuum Membrane Film Wrapped Around a Three-Dimensional (3D) Frame to Displace Air, on Which 3D Graphene ??Floats?? a First Stack of Two-Dimensional Planer Sheets of Six- Member Carbon Atoms Within the Same 3D Space as a Second Stack of Graphene Oriented at a 90- Degree Angle