Elevator to HEAVEN
$3 million has been allocated to study the idea, which
many say is technical possible. What do you think
by: Carl Hartman
W ASHINGTON, D.C.
President Bush wants to return to the moon and put a man on Mars.
But scientist Bradley Edwards has an idea that’s really out of this world: an
elevator that climbs 62,000 miles into space. Edwards thinks an initial version
could be operating in 15 years, a year earlier than Bush’s 2020 timetable for a
return to the moon.
Edwards is not just some guy with an idea. NO! He’s head of the space elevator project at the Institute for Scientific Research in Fairmont, West Virginia, NASA already has given it more than $500,000 to study the idea, and Congress has earmarked $2.5 million more. “A lot of people at NASA are excited about the idea,” said Robert Casanova, director of the NASA Institute of Advanced Concepts in Atlanta.
EDWARDS BELIEVES a space elevator offers a cheaper, safer form of space travel which eventually could be used to carry explorers to the planets. Edwards’ elevator would climb on a cable made of nanotubes — tiny bundles of carbon atoms many times stronger than steel. The cable would be about 3 feet wide and thinner than a piece of paper but capable of supporting a payload up to 13 tons.
The cable would be attached to a platform on the equator, off the Pacific coast of South America where winds are calm, weather is good and commercial airplane flights are few. The platform would be mobile so the cable could be moved to get out of the path of orbiting satellites. David Brin, a science-writer who formerly taught physics at San Diego State University, San Diego, California , believes the concept is solid but doubts such an elevator could be operating by 2019.
“I HAVE NO doubt that our great-grandchildren will routinely use space elevators, he said. “But it will take another generation to gather the technologies needed.” Edwards’ institute is a third annual conference on space elevators in Washington, D.C. starting Monday .July 6th, 2004
A keynote speaker at the three-day meeting will be John Mankins, NASA’s manager of human and robotics technology. Organizers say it will discuss technical challenges and solutions and the economic feasibility of the elevator proposal. The space elevator is not a new idea. Russian scientist Konstantin Tsiolkovsky envisioned it a century ago. And Arthur C. Clarke’s novel “The Fountains of Paradise,” published in 1979, talks of a space elevator 24,000 miles high and permanent colonies on the moon, Mercury and Mars.
The difference now, Edwards said, is “we have a material that we can use to actually build it.” He envisions launching sections of cable into space on rockets. A “climber” — his version of an elevator car — would then be attached to the cable and used to add more lengths of cable until eventually it stretches down to Earth. A counterweight would be attached to the end in space. Edwards likens the design to spinning a ball on a string around your head.” The string is the cable, and the ball on the end is a counterweight. Earth’s rotation would keep
The elevator would be powered by photo cells that convert light into electricity. A laser attached to the platform could be aimed at the elevator to deliver the light, Edwards said he probably needs about two more years of development on the carbon nanotubes to obtain the strength needed. After that, he believes work on the project can begin.
“The major obstacle is probably just politics or funding, and those two are the same thing,” he said. “The technical, I don’t think that’s really an issue anymore.
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