Space Elevators have long been the purview of science fiction authors, but maybe the reality isn't too far from catching up. The LiftPort Group conducted a second round of tests this month in the Arizona desert where their prototype climbing machine was able to top more that 1500 feet. That's a long way from orbit, but a definite step in the right direction.
The idea of creating an elevator that would allow easy, cheap access to Earth orbit is very compelling. Instead of spending thousands of dollars per pound to push materials to orbit via rocket boosters, thousands of tons could be lifted in via elevator for a tiny fraction of the cost. This could be the true gateway to the stars for humanity. Prices could drop far enough to make space tourism something besides a rich mans distraction. How about a hotel and casino with an Earth view?
There are, however, a number of obstacles to be overcome. First, the tensile strength of a material capable of holding up under its own weight from such a height is beyond most of our current materials. Some materials, such as carbon nanotubes, look good for this application, but creating sufficient quantities in a reasonable time is still beyond our current science. Beyond materials, we must consider the social barriers. All too recently, the tallest buildings in the US came under attack and were brought down by terrorists looking to make a statement. What better target could be had than a space elevator? Fly into it, shoot rockets at it, smuggle bombs into the cargo--whatever the method, a space elevator would be at extreme risk.
I'd like to believe that this could all come to pass within my lifetime. I'm 37 (almost 38) now and can expect to live 40 or 50 more years (assuming no accidents or illness cuts it short). Will we be able to hop on an elevator to hotels and casinos in orbit before I'm gone? I sure hope so. Go LiftPort!
LiftPort: News