Ask Lemmy
A Fediverse community for open-ended, thought provoking questions
Rules: (interactive)
1) Be nice and; have fun
Doxxing, trolling, sealioning, racism, and toxicity are not welcomed in AskLemmy. Remember what your mother said: if you can't say something nice, don't say anything at all. In addition, the site-wide Lemmy.world terms of service also apply here. Please familiarize yourself with them
2) All posts must end with a '?'
This is sort of like Jeopardy. Please phrase all post titles in the form of a proper question ending with ?
3) No spam
Please do not flood the community with nonsense. Actual suspected spammers will be banned on site. No astroturfing.
4) NSFW is okay, within reason
Just remember to tag posts with either a content warning or a [NSFW] tag. Overtly sexual posts are not allowed, please direct them to either !asklemmyafterdark@lemmy.world or !asklemmynsfw@lemmynsfw.com.
NSFW comments should be restricted to posts tagged [NSFW].
5) This is not a support community.
It is not a place for 'how do I?', type questions.
If you have any questions regarding the site itself or would like to report a community, please direct them to Lemmy.world Support or email info@lemmy.world. For other questions check our partnered communities list, or use the search function.
6) No US Politics.
Please don't post about current US Politics. If you need to do this, try !politicaldiscussion@lemmy.world or !askusa@discuss.online
Reminder: The terms of service apply here too.
Partnered Communities:
Logo design credit goes to: tubbadu
view the rest of the comments
Constructing an Orbital ring and then using that to get a form of space elevator built.
Totally possible to build with our current technology but the cost if we do it pre space elevator or similar is pretty insane.
Building a ring let's us basically have a stable space side anchor at low earth orbit instead of geo sync ish like you need for a normal space elevator to match ground speed.
Even more fun is cost for additional rings drops massively and you can build them in different orientations you can get space elevators to rings without having to be on the equator.
https://www.youtube.com/watch?v=LMbI6sk-62E
Last and my favorite part is the possibility of having literally trains that go up to a ring cross an ocean and go back down. Wouldn't be faster than planes but massively better cargo capacity and efficiency as well as comfortable for passengers.
From what I've seen about a space elevator, is that the we don't have the means to do it without creating a massive material shortage in the world.
The most plausible idea I've seen is using the centrifugal force of the earth spinning to keep a mass at LEO. But without a futuristic material like long carbon nanotubes, we would have essentially a ten mile thick metal cord tapering to something a few feet thick, and you would be limited in payload to like a few hundred pounds.
Just curious, why do you think a ring would predate the elevator?
As AAA said in a comment beside me it isn't so much that I expect it would predate a space elevator. Simply that it is possible with current tech rather than still waiting on additional moderately likely breakthroughs like long chain carbon nanotube tether.
Also there are plenty of options to have the vast majority of the material be from space and not the surface since the core idea is a metal like copper being spun above orbital speed after being made into a full loop then used for the mag lev to keep at ground speed. There are absolutely a lot of astroids that might allow for that.
(Not OP) Because simply from a construction-point-of-view it's achievable now. Unlike a space elevator, a ring could actually be built and used with today's materials.
Maybe I'm just a pessimist, but I don't see us launching enough space raw material from ground level to build it. Not trying to sound rude, I've just been in the logistics game(even helped put a small satellite into orbit) and I just don't see the millions of tons of material needed being launched from the ground. Again, not trying to sound rude, this is just my observation from being "in the game".
Mine the moon and build the elevator and/or ring from the top down.
skyhook!