Airships are
designed to be sturdy and cross great distances. The older airships, such as the Zeppelin,
created buoyancy through the use of hydrogen.
Unfortunately, hydrogen is highly unstable and can become explosive if
exposed to static electricity or lighting.
The Hindenburg disaster demonstrated how dangerous hydrogen was to
public safety when an entire Zeppelin caught fire. The airships of today have come a long way
since the Zeppelin era. Modern Airships
utilize helium, which is stable and safer than hydrogen, to create
buoyancy. To ascend, the ship releases
compressed helium gas from its tanks to displace the air that had originally
filled the hull. To descend the ship
compresses the helium and allows air to refill the hull.
Popular Mechanics |
Northrop Grumman
is creating airships for military purposes but Lockheed Martin and Worlwide
Aeros Corporation are creating airships for transporting cargo. The cargo application, especially the
Worldwide Aeros Corp., Aeroscraft airship, is appealing because it requires no runway
to take off or land. The Aeroscraft can
also carry 66tons of cargo, more carrying capacity than a Boeing 767, which can
be transported anywhere in the world. There
is no surprise that most of the capital investment behind these projects comes
from NASA and the Pentagon. The average
investment firm is not going to take the risk on an unproven and futuristic
helium airship venture.
Orange County Register |
This technology is
important because this capability will allow large amounts of cargo to arrive
in remote locations that were traditionally impossible to reach. This also means that, through the use of GPS
technology, these airships can allow distributors to bypass old international
transportation routes and deliver cargo closer to the customer. The need for special equipment and large
diesel trucks will eventually become obsolete when this technology is refined
and mass produced.
Popular Mechanics |
Why this is all important for the
environment and safety?
1) This
new technology is better for the environment.
Unlike powerful cargo planes, there is no need for high fuel consumption
jet engines and large wing spans to create lift. These new airships only need enough fuel to
propel them to their locations and compress the helium hull for descent.
2) There
is no need for the dredging operations that are required to maintain a port for
large shipping vessels. In order to
lower the cost of transportation and increase the profitability of shipping
operations many ship builders continue to make their ships even larger than
before. Larger ships require ports to
perform more dredging which negatively impacts marine life.
3) Airships,
unlike large shipping vessels, will not be exposed to the same dangers from
pirates. Airships can cross the vast
oceans and never once come in contact with a pirate. This means the crew will be safer and the
amount of insurance required in the event of a loss will be much lower.
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