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European Space Agency engineer Age-Raymond Riice as developed a remarkably simple way to propel a space elevator upward with a series of rhythmic jerks.  (Source: BBC)
A new method could help realize dreams of a space elevator

A space elevator has been a long standing dream of many in the science and tech community.  Conceived by Russian scientist Konstantin Tsiolkovsky in 1895 and popularized by author Arthur C. Clarke, many believe the idea holds a great deal of real world promise, and may eventually provide the cheapest way to transport people and goods into space.  With many countries such as Japan, the ESA, and the U.S. finally getting serious in a race to become the first nation to develop a space elevator, enthusiasm is at a high.

Unfortunately, though, much of the materials and methods needed to build such an elevator are infeasible.  While carbon nanotubes could allow for a cable strong enough to hold a space elevator in theory, one key problem is how to propel the elevator along the cables into space.

Among the previously suggested methods of powering the climber into space were beaming microwave or laser power, or even concentrated solar power to the climber; but all these efforts have a long ways to go before being close to being feasible.

However, a remarkably simple idea proposed at the Second International Conference on Space Elevator and Tether Design in Luxembourg could hold the key to powering the space elevator.  European Space Agency ground station engineer Age-Raymond Riise showcased a remarkably simple propulsion method which uses a series of rhythmic jerks to propel a device upwards along a taut cable.

For his demo he tied brushes with their bristles pointing down, representing the elevator cabs around the broom stick, representing the elevator cable.  As the brushes pointed downward, they required less force to slide up than to slide down.  The assembly slid up and down along the broomstick, but experienced a net upwards motion, slowly climbing to the top of the broomstick.

The novel new method holds great promise as similar jerking motion could be applied to raise the elevator on a full-sized design, in theory.  The key technical challenge would be designing a cable strong enough to withstand the heat and forces exerted on it by the atmosphere. 

However, advocates argue that with payload costs still remarkably high, the financial and social incentives for building a space elevator are enormous.

Building a space elevator could enable novel new industries.  Describes Benoit Michel of the Catholic University of Leuven, a conference attendee, "From my point of view, the space elevator project is important because it enables a far more directly useful project - installation of large space solar power satellites around the Earth to provide continuous, cheap, CO2-neutral, environmentally friendly energy.  I firmly believe that the next century will have a large space-based industry and that industry will be the main energy provider for the whole mankind."

Mr. Riise has been approached by commercial aerospace terms about his idea and is in talks with them over terms.



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RE: I see this idea in an Austin Powers movie
By Dreifort on 1/6/2009 1:04:27 PM , Rating: 3
don't let us rub off on you


RE: I see this idea in an Austin Powers movie
By DPigs on 1/6/2009 1:42:10 PM , Rating: 3
Lol. This thread is made of pure win. =D


RE: I see this idea in an Austin Powers movie
By Dreifort on 1/6/2009 2:04:19 PM , Rating: 2
Don't break the rythm DPigs... we don't want to end this thread before it climaxes.


RE: I see this idea in an Austin Powers movie
By Drexial on 1/6/2009 2:29:19 PM , Rating: 5
Jerking always did seem like the cheaper way to get a load out.


RE: I see this idea in an Austin Powers movie
By tastyratz on 1/6/2009 2:36:14 PM , Rating: 2
what about what the shaft is made of? It has to be VERY stiff and point straight to the sky or they are in for a big mess after the load launches.


By Dreifort on 1/6/2009 2:45:28 PM , Rating: 2
the engineers asked where they were supposed to put the new elevator shaft... the scientists repsonded, "Anywhere, but if you get it near a black hole, that would suck...and if you point it in the wrong direction, that would blow."


RE: I see this idea in an Austin Powers movie
By MrBlastman on 1/6/2009 2:48:34 PM , Rating: 2
The last time I got shafted by a stiff I... umm...

oh, whoops...


RE: I see this idea in an Austin Powers movie
By Dreifort on 1/6/2009 2:59:05 PM , Rating: 2
if you take a date on this elevator, will she tell her friends how she had the ride of her life?

or will she say it was out of this world?


RE: I see this idea in an Austin Powers movie
By MrBlastman on 1/6/2009 3:36:56 PM , Rating: 2
It depends on how good you were with your hands...


RE: I see this idea in an Austin Powers movie
By Dreifort on 1/6/2009 3:47:38 PM , Rating: 3
just have to push all the right buttons and hope you reach the top floor before the cable pops.


RE: I see this idea in an Austin Powers movie
By cheetah2k on 1/6/2009 4:11:13 PM , Rating: 2
Husband: Hey baby, how about a bit of bump n grind tonight?

Wife: Sorry honey, I'm taking the Space Elevator!


RE: I see this idea in an Austin Powers movie
By Dreifort on 1/6/2009 4:19:06 PM , Rating: 2
sorry, space elvator is out of commission for 45 mins.

overcast weather, there is a whiteout up top.


RE: I see this idea in an Austin Powers movie
By tastyratz on 1/6/2009 4:27:05 PM , Rating: 2
a shaft like that could really set the mood with a little "atmosphere"... don't you think?


By acase on 1/7/2009 9:17:21 AM , Rating: 3
quote:
"The Space Elevator will be built about 50 years after everyone stops laughing" -- Sir Arthur C. Clarke


Looks like we have at least another 50 years to be backed up before this idea comes.


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