/sci/ - Science & Math

[Anonymous No.11154748]

https://youtu.be/dqwpQarrDwk
Alright so whats the "catch" here?

[Anonymous No.11154755]

>>11154748
It won't ever happen. That's the catch.

[Anonymous No.11154763]

>>11154748
It's basically impossible to engineer such a contraption.

[Anonymous No.11154975]

>>11154748
No catch, just a massive investment and about 10-15 years of research.

[Anonymous No.11155049]

>>11154748
deploying really long tethers is hard. Tether dynamics may be weird.

[Anonymous No.11155050]

>>11154748
There's no space outside the dome.

[Anonymous No.11155067]

>>11155049
Based upon our current tether experiments, nothing weird has happened yet.

[Anonymous No.11155117]

>>11154748
It's probably too much of an investment to appeal to such a small industry.

[Anonymous No.11155118]

>>11155067
>Based upon our current tether experiments, nothing weird has happened yet.
So you mean all those experiments we didn't do produced no result.

[Anonymous No.11155272]

(nice I wanted to make a thread too)

Sounds like bullshit perpetuum mobile.
These guys like to say some utter bullshit but this one gets me the most.
To launch a ship it needs energy but they pretend like it's free energy.
Would it get the rotation from Earth's centrifugal force? How?
It's most probably utter bullshit because they didn't explain the physics behind it at all.

[Anonymous No.11155305]

>>11154748
Imagine the electric potential for a 400 km tether running from ground to the sky.

[Anonymous No.11155309]

>>11155272
(cont)
I guess it would get back the energy from the ships that come back.
But they acted like it would work by just launching ships, that doesn't seem right.

But that's only in theory. To get energy back from returning ships the ships would need to literally crash into it. If they slow down before docking it's pointless.

[Anonymous No.11155313]

OP getting a lot of (You)s

[Anonymous No.11155314]

>>11155272
>description
>Sources
>"A rotating tether of just the right length, and in just the right orbit slows down its tip relative to the ground at the bottom, and speeds it up at the top like a catapult. "
>https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20070001536.pdf
heres some physics
theres probably more physics in the other sources but this was the first one i clicked on

[Anonymous No.11155324]

>>11155314
That's just a relative speed to the ground.
That doesn't explain how it gets the extra energy to launch new ships repeatedly.
Every new ship should slow down the rotation. But they act like it's a perpetuum mobile.

[Anonymous No.11155326]

>>11155118
... I am going to presume you just don't know and advice you do a cursory Google search for tethers in space and how many have been launched.

[Anonymous No.11155332]

>>11155324
Dude... guess how we know you didn't watch the video?

[Anonymous No.11155342]

>>11155332
so you can't explain it, ok

[Anonymous No.11155351]

>>11155342
I don't have to, they literally say it in the video. Which, again, is how we know you didn't watch it.

[Anonymous No.11155361]

>>11155351
when?

[Anonymous No.11155365]

>>11155361
I am not spoonfeeding you things so you don't look like an idiot, anon.

[Anonymous No.11155378]

>>11155365
they didn't say it you fucking retard
why are you afraid to point it out you fucking retard?

[Anonymous No.11155397]

>>11155067
We haven't been able to deploy tethers long enough. All tether experiments have been busts because they jammed at some point during deployment.

[Anonymous No.11155403]

>>11155378
Hahaha, they even animated it, dude. Go watch the video And stop commenting on stuff you clearly didn't watch.

[Anonymous No.11155410]

>>11155397
I will inform Nada de SEDS missions were holograms, apparently.

[Anonymous No.11155420]

Massive investment, lots of stationkeeping when in use, and neither the space industry to make use of it yet, nor the launch capacity to pull it off any time soon. Looks better than the space elevator tho.

[Anonymous No.11155421]

>>11155403
>>11155365
found it you fucking retard
https://youtu.be/dqwpQarrDwk?t=109
it's too short and not properly explained in detail while it's the most important part

[Anonymous No.11155429]

>>11155421
>it's literally on the video
>gives as much detail as everything else on the video
>claimed it was impossible
>claimed it wasn't there
>other people art side e the retards
On the bright you have proven you're an idiot, so that's cleared up. Now go back.

[Anonymous No.11155430]

>>11155421
>3:29
You can only keep it going if you are landing as much as you launch. If not you need more energy. Handwave handwave yadda yadda ignore how much energy you actually need.

[Anonymous No.11155437]

>>11154748
these kurzgesagt just make me uncomfortable honestly. It's just this weird futurist cult with animations.

[Anonymous No.11155439]

https://youtu.be/dqwpQarrDwk?t=97

So it's basically a space elevator that's not connected to the ground.
Then they make it spin so the ships don't need to climb it.
And the speed of the ship keeps the rotation going.
There.
It's simply not properly explained because the guys who make these videos have no fucking idea about these things. They just google it and make a pretty video.

>>11155429
they are retards by not answering the question like the retards they are you fucking retard.

[Anonymous No.11155445]

>>11155437
they have some cool stuff but a bunch of them is sensationalist clickbait bullshit for views

[Anonymous No.11155457]

>kurz gesagt vid
I FUCKING LOVE SCIENCE
FUCK, SCIENCE IS AWSOME

[Anonymous No.11155461]

>>11155439
You sound butthurt you showed the whole thread you are an idiot and now want to try to explain what was in the video so you don't too stupid. Enjoyed alwaysnremember to watch before commenting.

>>11155420
It a real egg chicken issue. Skyhooks only make sense in the context of a develop space industry, but they are basically required in order to make them start up as well. Much of how trains required a bit of government push then exploded despite the lack of government money later, the first one will need help to overcome the chicken-egg scenario.

[Anonymous No.11155473]

>>11155461
>watch before commenting
I watched it you fucking retard. Like I said you fucking retards it's not properly explained you fucking retard.

[Anonymous No.11155657]

>>11155410
we need to go LONGER

[Anonymous No.11155768]

>>11154748
Catching spaceships and YEETING them to Jupiter :DDDDD

[Anonymous No.11155770]

>>11155272
>When you didn't watch the whole video

[Anonymous No.11156156]

>>11154748
No one is paying for it that's the catch

[Anonymous No.11156196]

>>11155309
Watch the video moron.

[Anonymous No.11156203]

>>11155473
You narcissistic little piece of shit. Just admit you're a retard and accept it.

[Anonymous No.11156207]

>>11155430
Nope, you can just modulate the speed/height at which things are launched into space or sent back to earth.

[Anonymous No.11156281]

>>11156156
unironically it's probably not much more expensive to build a phobos tether than something like starlink, the musk meme might make the staryeet a reality

[Anonymous No.11156287]

>>11156207
Conservation of momentum says you are wrong.

[Anonymous No.11156700]

>>11154748
the tech has existed since the 90s but governments wont allow spaceflight that is too cheap because that would challenge their global hegemony

[Anonymous No.11156709]

>>11156700
That's a new conspiracy.

[Anonymous No.11156713]

>>11154748
>Kurzge.s.o.y
Dropped.

[Anonymous No.11156714]

>>11154748
You have to reaccelerate them.

[Anonymous No.11156715]

>>11156713
Ok weeb.

[Anonymous No.11156741]

>>11156709
it's true

there are numerous international competitions to develop cheap orbital launch systems but the prize money outweighs the cost of an orbital loicense

if you were a superpower international banking cartel what would you do if some faggot figured out how to mine gold from asteroids?

they are doing the smae with fusion and going full alarmtard over the tiny bit of neutron transmutation and only a handful of companies will be allowed to use it

https://sciencebusiness.net/framework-programmes/news/eu-sets-eu10m-prize-cheap-rockets

>10m
>a fraction of the cost of bribing government to allow you to launch a spacecraft

[Anonymous No.11156750]

>>11156741
I thought that most of the cost from developing a new launcher was the cost of developing the new equipment (like engines)? Do you have a source that states that the most expensive part is obtaining a licence or paying off the government in some way?

[Anonymous No.11156755]

>>11156750
try finding numbers for the cost of a loicense.. it's impossible and the lowest estimate is about a million but that doesnt include all the palm greasing

you can choose to not believe but look for yourself and the euro competition has a bunch of "proliferation and security" requirements that probably excludes anyone browsing this god forsaken forum

[Anonymous No.11156762]

If you are gonna put the effort in for this, build a fucking orbital ring. Way more useful.

https://www.youtube.com/watch?v=LMbI6sk-62E

[Anonymous No.11156764]

>>11156755
>try finding numbers for the cost of a loicense.. it's impossible and the lowest estimate is about a million but that doesnt include all the palm greasing
Do you have a source on that?

[Anonymous No.11156781]

>>11156762
why does that guy talk like a retard?

[Anonymous No.11156784]

>>11156781
https://en.wikipedia.org/wiki/Rhotacism_(speech_impediment)

[Anonymous No.11156789]

>>11155067

But we have made tether experiments in orbit. YOU FUCKING SMOOTH BRAIN IMBECILE.

https://www.youtube.com/watch?v=dlIF0P9j0cM

[Anonymous No.11156806]

>>11156789
You might wanna check your comments before making them, dude.

[Anonymous No.11156831]

>>11154975
>massive investment
so like 2 weeks of Iraq war?

[Anonymous No.11157668]

>>11156831
Like around an iraq war and a half, but spent over about 20 to 30 years.

[Anonymous No.11159412]

>>11156762
Orbital rings take WAAAAAAAAAAY more effort than tethers

[Anonymous No.11160154]

>>11154748
Germans lost the war, so now the priority is feeding 4 billion niggers

[Anonymous No.11161608]

>>11159412
Tethers aren't a free ride, they lose speed with each lifting. You need to boost it again each time to keep the whole thing from falling back down.

Just as much effort in the long run to make rockets.

Just, Make, A Ring!

[Anonymous No.11161615]

>>11154748
I can't stand these videos.

[Anonymous No.11161688]

>>11161608
did you watch the video?
you get the speed back when you slow down landing ships
as long as most trips are round trips, you don't need to recharge

[Anonymous No.11161693]

>>11155437
>>11155457
>>11156713
>>11161615
thread should have ended here

[Anonymous No.11161866]

>>11154748
this video made me a believer in space colonization and asteroid mining.
This concept demolishes all arguments about energy costs being prohibitive.
Sure the initial expense would be enormous, but it would pay for itself.

[Anonymous No.11163159]

>>11161608
On Earth tethers can be reboosted using basically no propellant. Electrodynamic tethers can raise their orbit by interacting with Earth's magnetic field

[Anonymous No.11163248]

>>11154755
C O P E
O
P
E

[Anonymous No.11163337]

Anyone knows what organisation is behind these videos?

[Anonymous No.11163609]

>>11163337
Kurzgesagt is a German channel started by an individual (not an organisation) It's basically a german animator/youtuber that got popular internationally and built a business around his concept while hiring a team.

[Anonymous No.11163611]

>>11163609
That explains the hogwash.

[Anonymous No.11163631]

>>11163248

E E E
P P P
OOO
E P O C O P E
OOO
P P P
E E E

[Anonymous No.11163636]

>>11154748
It's not possible with modern technology to build something like this, just like space elevators etc. The lesson some people haven't learned is that just being able to theorize about something in depth doesn't mean it's technically feasible at all.

[Jeffery Epstein No.11163884]

>>11154748
geopolitical relations; countries agreeing not to knock that shit out of orbit

plus

damage to the cable from space debris