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Inflatable Tower Could Climb To the Edge of Space
MonkeyClicker writes with mention of a proposal that could see an inflatable tower helping to carry people to the edge of space without the need for rocket propulsion. This would function in place of previous space elevator designs which featured a large cable and could be completed much faster, if proponents of the project are to be believed. "To stay upright and withstand winds, full-scale structures would require gyroscopes and active stabilization systems in each module. The team modeled a 15-kilometer tower made up of 100 modules, each one 150 meters tall and 230 meters in diameter, built from inflatable tubes 2 meters across. Quine estimates it would weigh about 800,000 tonnes when pressurized — around twice the weight of the world's largest supertanker."
yep -world's biggest bounce house
for the world's richest, most overgrown kids
-I'm just saying
I came up with lots of ideas like this in college...I also smoked a lot of weed in college.
n/t
Bot Assisted Blogging
I guess this means that other crap idea of the space elevator is dead? (Maybe if we built a huge wooden badger.)
Note that this is would only extend a few tens of kilometers. It's to the edge of space, whereas a full elevator is aimed at getting *out* of Earth's gravity well.
They're solving two different problems and aren't really that comparable.
They were trying to buld a zeppelin, but the printer did the plans in portrait format.
Could happen to anyone.
Confucius say, "Find worm in apple - bad. Find half a worm - worse."
Who else would be at the forefront of inflatable technologies?
Didn't we do this already? I thought this is how we ended up with all the different languages.
Their 15km version would need ten years of the entire world's helium production to fill it.
The 200km version would use up over half the world's estimated helium reserves.
No sig today...
This could have some use for escaping earth's gravity. Among all the theorized technologies one of the most promising has always been just launching stuff into space via rail gun style. If you have a long tube with nothing but vacuum inside it you can drastically increase the efficiency of such a device. The problem is the end of the device has to exit into something near vacuum or it would be like slamming into a solid wall made of atmosphere.
If a tower like this could be built such that it contained a vacuum corridor inside it then we could perhaps finally pursue this idea with already existing technologies.
Note that this is would only extend a few tens of kilometers. It's to the edge of space, whereas a full elevator is aimed at getting *out* of Earth's gravity well.
Well if you just use it as a regular elevator and stop at the top, it's a nice tall observation deck where the atmosphere is really thin but not quite "into space".
But if it can support the weight of the elevator and observation platform, it should be able to provide an equal upward force to a lighter payload that is being accelerated. Such a projectile might leave the top of the structure with enough velocity to put the apogee of its trajectory in low-earth-orbit altitudes.
You'd have to provide additional thrust during that hop to bring the PERIGEE above significant atmospheric braking in less than half an orbit. But you've won half the battle by getting above the significant atmosphere on electric power rather than rocket reaction.
Perhaps lean the thing over to get significant downrange velocity - and support its less-vertical run with more compression members of a similar construction while building a broader structure of multiple members to avoid bending between supports. (Octagon truss, anyone?)
And the payload might also be composed of something like a long, thin, "cannon" with a "bullet" that is your final payload. "Fire" it (electromagnetically again) when near apogee. Then the "bullet" is circularized and the "cannon" returns to Earth for reuse with less momentum than when it left the elevator/catapult. Reenter and glide down - or land into another similar elevator structure and be gently lowered for reuse while the energy from the cannon stage's momentum and altitude is recycled into electric power.
Bantam Dominique roosters crow a four-note song. Once you've heard it as "Happy BIRTHday" you can't NOT hear it that way
Buckminster Fuller (my hero ;-) already came up with this, altho' he intended to use concrete. Basically, if the structure is large enough, making the inside of the structure a few degrees warmer than the outside air will cause it to float. Bucky described a sphere about 1 mile in diameter to be airborne, and somewhat smaller cones to be sea cities.
Later . . . Jim
Isn't that what people said about Nikola Tesla?
+1 IDisagreeSoHeMustBeATrollOrAnAstroturferOrAShill
If your tower remains inflated for more than four hours, seek the advise of a structural engineer immediately.
Happy now?
Failure to follow this advice may result in non-deterministic behavior.
Balloon can only reach an elevation where it matches the buoyancy of the air. The article doesn't say, but I presume that the structure will be heavier than air. For that to work, you need something holding you up from the bottom, or a space elevator.
Sa da te!
Chas - The one, the only.
THANK GOD!!!
it's the spacenumber bed.
"If still these truths be held to be
Self evident."
-Edna St. Vincent Millay
Don't harsh my sci-fi utopia buzz, man.
I'm all about the inflatable towers to outer space. But not until we've got bullet trains from Chicago to Memphis so I can go listen to some R&B and eat BBQ and be home by morning. First the bullet trains, then the inflatable towers to outer space.
You are welcome on my lawn.
No, they said "He's clever with all the inventions, but don't lend him any money. Plus, he looks just like David Bowie."
You are welcome on my lawn.
Since it's not in the summary, Brendan Quine is an associate professor at in Space Engineering at York University in Toronto, Ontario (Canada). He is responsible for the Argus micro-spectrometer on the CanX-2 nanosatellite, currently operating on orbit. The satellite was developed by the University of Toronto's Space Flight Laboratory.
Aikon-
Young Jack planted some beans today.
Hey, compared to an inflatable ladder, I'm putting my money on Jack and his beanstalk.
I just had a flash back from my Newtonian Mechanics class: A Spider lands on the center of a record player rotating at 45rpm's. The Spider attaches a web to the center of the record and begins to walk to the edge of the record looking for a way off. Given the weight of the spider, speed of the record; How far will the spider travel before being thrown off?
I RTFA; but some of the details seemed a little fuzzy, like the density of the outside with respect to the inside of the tube, load bearing. Maybe a 3D Real Time Model could be fashioned in something like Blender3D. If the math proves out, cool. But if not, then maybe the model could be applied to some other similar engineering solution. That in itself would be a worthy engineering accomplishment.
A 20km-tall inflatable structure is indeed admirable, and a realistic step in the right direction towards building real super-structures like a space elevator, a floating Buckyball, etc.
An novel approach for non-rocket launch, which may be more possible with the current state of technology than a space elevator (in that it requires less quantity of unobtanium), is a launch loop. It uses reactive centrifugal force to hold itself aloft.
http://en.wikipedia.org/wiki/Launch_loop
There have been unofficial studies done of 100 km tall towers using "aerospace grade" materials. Balloon-tanks of extremely high-pressure gas made out of boron would be amazingly light but have staggering compressive strength. (You'd use lots of small ones to avoid ultra-high pressure in super-long columns.) There have also been studies of towers made form carbon fiber, aluminum, and steel. These have an exponential profile, and a "fractal truss" structure. Though huge, they'd me mostly empty space, to the point that most of the tower would be hard to see from the ground. The tubular beams would have teardrop-shaped fairings to minimize wind loads. The towers as a whole would be staggeringly heavy, but still *theoretically* possible to build, and *theoretically* affordable by superpowers like the United States. Will they ever happen in real life? No way. But engineers and physicists love thinking about this stuff and doing the calcs.
If your tower remains inflated for more than four hours, seek the advise of a structural engineer immediately.
Happy now?
No, that's just an inflatable tower in my pocket.
This didn't go well the last time. Newspaper headline:
NIGHTMARE ON DREAMSPACE: MUMS, DADS, KIDS PLUNGE TO EARTH
HORRIFIED witnesses told last night how they watched helplessly as parents and children plummeted to the ground after a huge bouncy castle was sent rocketing 120ft into the air.
http://www.mirror.co.uk/news/top-stories/2006/07/24/killed-by-the-bouncy-castle-115875-17435718/
http://www.google.com.au/search?q=dreamspace+inflatable