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E-Green Technologies - 21st Century Airships, Inc. Begins Final Completion and Integration of Bullet 580

E-Green Technologies (EGT) - 21st Century Airships, developers of technologies for mid-, high-altitude and heavy-lift airships, has entered into the final stages of integration and completion of the Bullet 580, which will be the world’s largest operating airship.

Prototype 125-foot Bullet. The commercial version is 235 feet in length. Click to enlarge.

The 235-foot Bullet 580 is designed to carry a payload of up to 1,000 pounds at 20,000 feet and fly at speeds up to 70 knots with a cruising speed 30 to 35 knots. The companies, who merged late last year, have already successfully built and flown 14 prototypes in order to test new inventions, but the Bullet 580 is the first airship to be put into production for commercial use.

The Bullet 580 is a multifunctional airship intended to serve as a dedicated near-space satellite for communications relays, broadcast communications, missile defense warning, airspace/maritime surveillance and control, position and navigation (GPS), weather monitoring, battlefield environmental monitoring, electronic countermeasures, and weapons platforms as well as geophysical surveys.

Airships have undergone surprisingly little evolution through history, and this is what makes the proprietary designs so desirable to government and commercial customers. Our airships are radically different designs that move beyond the performance limitations of traditional blimps or zeppelins such as simple construction, long flight duration, relatively efficient operation versus aircraft, potential for vast size and cargo capacity, and the ability to take-off and land vertically—combined with forward thrust in the air from engines.

— E-Green Technologies Chairman and CEO, Michael Lawson

EGT has planned an inflation test of the Bullet 580 Airship in May 2010 at the Garrett Coliseum in Montgomery, Alabama. The first test flights will take place in the summer of 2010.



The problem with airships (besides durability in bad weather) is frontal cross section. You only get about 1Kg of lift for every cubic meter of Helium. Your structure weighs something. In the 1970's an English company thought building a flying saucer shaped dirgible would make safe, economical air-cargo transport more energy efficient. The problem was that a 700' diameter flying saucer had less cargo capacity than a 747, but because of its enormous frontal cross section, and spending 6x longer enroute, it didn't necessarily save that much fuel. It is much harder to land and dock.

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