Interesting company... a think tank. Maybe Bob Jones submitted a request to join. Only $200,000 to develop the vacuum blimp out of the theoretical stage. http://www.hovertech.com/home/about/index.html
The Holy Grail of Airships By Dominic Florin March 8, 2007
Today's blimps use helium because it's lighter than air and nonflammable. But helium is expensive to produce. A much cheaper alternative would be to use a vacuum— provided a rigid yet lightweight airframe can be built. HoverTech's Dominic Florin explains how such a craft might be possible.
The modern dirigible, or blimp, has never been considered a likely alternative to the automobile. Afterall, they're slow, hard to maneuver, and you'd never find a parking space big enough. But blimps don't have to take up a whole city block either.
One of the early pioneers of lighter-than-air craft was the Brazilian-born inventor Alberto Santos-Dumont who built and flew the first dirigible balloons in Paris, France. Long before there was an air traffic control, Santos-Dumont would fly along Paris boulevards at rooftop level, often landing in front of a fashionable outdoor cafe for lunch. On one occasion he even flew an airship to his own apartment in the center of Paris. His cigar-shaped dirigibles were filled with hydrogen and typically no larger than a modern fourteen-wheeler. Their compact size was a result of lightweight construction, the use of hydrogen gas, and the fact that Dumont was only 5'4"— and always flew solo.
Today, helium is the gas of choice in blimps because it has 92.64% of the lifting power of hydrogen, but is nonflammable. However, because helium must be extracted from natural gas, it is expensive to produce. An alternative is to use a vacuum. Considered to be the "holy grail" of air ship design, a vacuum blimp would be cheap to maintain, capable of remaining aloft indefinitely, and could be quickly "deflated" thereby eliminating the need for a large hanger.
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