Design Your Own Space Elevator
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Join the National Marrow Donation Program: http://join.marrow.org/practical Trying sometime a little different this time - animation. Thanks to my friend, James, for the idea. Diving into the "meat and potatoes" of engineering this literal stairway to the heavens: the Space Elevator. Hope you enjoy it! Don't forget to watch Kurzgesagt's excellent video on the Space Elevator here: https://www.youtube.com/watch?v=qPQQwqGWktE (Sorry for the jab guys!) They say the devil’s in the details, but that’s not really true for the space elevator. The biggest hang ups in this concept are the most fundamental aspects of its design: the mass of the counterweight, getting power to the climber, the strength of the tether. If it ever does happen, it will be creative and passionate engineers leading the way. Thanks for watching and let me know what you think! Website: http://practical.engineering Patreon: http://patreon.com/PracticalEngineering Music: RSF - Backfire (https://www.youtube.com/watch?v=4dvHuTRBSa0) Sources: http://www.niac.usra.edu/files/studies/final_report/472Edwards.pdf http://www.spaceward.org/documents/papers/SEFC.pdf http://www.spaceward.org/documents/papers/SEPSAO.pdf https://pdfs.semanticscholar.org/d402/ba5f97884b7398ae2a1ff79136f9c1a03993.pdf Errata: -The Clarke Belt is misspelled. -At 1:40 the earth is spinning in the wrong direction. -Kurzgesagt is misspelled.
Comments
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Carbon nanofiber has a second benefit, it is highly conductive. So I'm surprised someone hasn't said, "Hey, this tether is an extension cord." But what have I heard? Not much.
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make a counter weight (or just make use of the ISS) with a giroscope and then deploy a tether just beneath suborbital . can then just manipulate the counterweight from the ground base control center then have a space plane like skylon dock with it. only astronauts with their spacesuit ascent this is called an assisted dynamic space hook elevator
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A new space elevator concept will help to make us a true space faring civilization .
It has multiple tethers at its center ( for greatest strength ) and
fewer tethers as you move away from center ( for lesser amounts of mass ) . It is also in an elliptical geosynchronous orbit , so it appears to drop straight down from space , pick up a payload , and return to space , thus requiring a much smaller system than an earth based space elevator. We already have material strong enough to get us within the distance of the lunar gravity center ( around 6,000 mi. ) add the proposed system above and we could do this now!
Let's get started.
What do you think? -
Whats the breaking length needed? 6'000 km ? 5'000?
As in the equivalent of that length up to 36'000 km but in a length under 1G and with no centripetal force? -
One thing I haven't heard anyone address about this is the inherent vulnerability of a static structure like this to adverse weather systems at the bottom and collisions with various items of "space junk" (old booster rockets, dead satellites, detritus from other collisions, etc.) at the top. Basically anything that could make the tether "bow" or twist instead of keeping that perfect straight line in all the graphics.
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Whats the Song
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But the problem is atmosphere .
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It's a disaster. Don't even bother. And ugly. Best guess is a rocket that spurns it out as it flies along is the only way to get it up anyway.
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nice video, but its kinda clickbait lol
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t has been suggested – 100 years after the completion of the first space elevator there will be more people living and working in outer space than on earth. The first space elevator is difficult to build.The second is much easier.The third, easier still etc.,until we have a ring of elevators around the planet.A trip to space will be as cheap as a train trip across the country.Colonizing the Moon and Mars will be affordable.Space tourism will be huge.Asteroid mining will be huge.And all of these industries will require lodging and related supply chain infrastructure for space side construction workers.A new space elevator concept will help to make us a true space faring civilization .
It has multiple tethers at its center ( for greatest strength ) and
fewer tethers as you move away from center ( for lesser amounts of mass ) . It is also in an elliptical geosynchronous orbit , so it appears to drop straight down from space , pick up a payload , and return to space , thus requiring a much smaller system than an earth based space elevator. We already have material strong enough to get us within the distance of the lunar gravity center ( around 6,000 mi. ) add the proposed system above and we could do this now!
Let's get started.
What do you think? -
It has been suggested – 100 years after the completion of the first space elevator there will be more people living and working in outer space than on earth. The first space elevator is difficult to build.The second is much easier.The third, easier still etc.,until we have a ring of elevators around the planet.A trip to space will be as cheap as a train trip across the country.Colonizing the Moon and Mars will be affordable.Space tourism will be huge.Asteroid mining will be huge.And all of these industries will require lodging and related supply chain infrastructure for space side construction workers.A new space elevator concept will help to make us a true space faring civilization .
It has multiple tethers at its center ( for greatest strength ) and
fewer tethers as you move away from center ( for lesser amounts of mass ) . It is also in an elliptical geosynchronous orbit , so it appears to drop straight down from space , pick up a payload , and return to space , thus requiring a much smaller system than
an earth based space elevator. Let's get started.
What do you think? -
Instead of the beam being emitted from Earth, Why not have a beam that comes from the other end when the object reaches half way?
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Wouldn't such elevator decrease Earth's spin speed? Angular_Momentum = Mass * Spin_Speed * (Width ^ 2); Earth's mass will stay the same (obviously), and so will angular momentum (due to angular momentum conservation law), so by increasing width of the system we'll decrease it's spin speed, causing a yo-yo despin effect.
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Excellent video! Regarding the problem of power transmission to the climber, would it not be better to eliminate the climber altogether? Instead, simply affix the vessel carrying one's cargo directly to the cable, and then manufacture and feed new cable out into space. This, of course, means that you'd have to do something with all of the excess cable at the far end. An easy solution would be to feed it back down to another base station somewhere on Earth. This second base station would help keep the cable tight, and ultimately recycle the old line. In effect, this configuration would produce a space elevator loop, as opposed to a single linear track. Here's a post I put out some time ago, outlining the concept: https://www.facebook.com/permalink.php?story_fbid=348987681974365&id=331085440431256&substory_index=0
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Could the lifter generate power from the friction experienced as it moves along the tether? Perhaps starting with a large battery pack or supercapacitors for the initial charge, or would this not be enough?
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Couldn't we build it on mt everest? 10000m minus!
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just have two conductive cables that would double as an grips for a climber with alternating current running through them, like a pantograph on a train
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About the problems with beamed power:
The atmosphere MAY actually help lift the climber. The laser will heat the collection surface, which will in turn heat the air. The air will expand and push the climber up.
They've built experimental aircraft that fly based on this principle:
https://www.youtube.com/watch?v=5_9ac-w4DW8 -
make 2 cabels and send electrizety thru them
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The tensile strength can be solved by attaching something like a zeppelin pulling the cable up(and keeping it balanced) to reduce the tension every x distance. Not fireproof tho..
10m 1sLenght
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