Did you know it is possible to build a space elevator today?
orionsarm.com
Space Elevator General is about learning the science and engineering behind the concept (ask and ye shall receive), the benefits it will provide to mankind (for example, no more need for taxes), the political realignments implied by such a project (a solar dollar rather than a petrodollar obviates the need for wars in the middle east), etc.
>inb4 thread spirals out of control with gay porn space elevator pill memes.
the space elevator would fall onto space and cut the pkanet in half, this is a dumb idea
this could be a good general until it gets flooded with planet X thoerists and warp drive neckbeards
we don't need a space elevator, helicopters fly more than high enough
This is worse than those flat earth threads.
Both are stupid, but this one could cost me money.
Flat earth type stuff is CIA directed disinformation. Since learning science and engineering is part of /SEG/, it can serve (partly) as a forum for debunking such nonsense and thereby undermining the power of the CIA.
That is part of the purpose of /SEG/ - with a robust, profitable infrastructure program there is no longer any need or justification for many black programs of the CIA like drug running.
As it stands now, the federal reserve issues low interest loans to banks who then turn around and issue the money to you at higher rates. The federal reserve is costing you money already.
Instead of such nonsense, we can use the federal reserve to fund infrastructure bonds at 0% for the space elevator. As a profitable enterprise, it would quickly generate a positive cash flow for the government and thereby reduce their ability to justify taxes on you.
In short, the space elevator puts money in your pocket rather than taking money out.
The issue I can already see with this (reading through, haven't finished) is that this has a big disadvantage to a conventional space elevator - namely, you aren't able to gain enough speed from rising up the elevator, since you only get up to LEO and you would need to get up to GEO (which this doesn't) for the velocity from the movement of the planet to be enough to put you in orbit.
Then again, that's a long term issue with the classic space elevator come to think of it - by sliding up and down the space elevator you are slowing the elevator down, curbing it backwards from the rotation of the planet; over time this could lead to structural collapse unless you use fuel to move it (which could be sort of feasible if you also use the elevator to move the fuel around, though I'm not sure about how efficient that is).
I hope it does, OP is a /sci/ reject who makes this thread at least every week.
>namely, you aren't able to gain enough speed from rising up the elevator
Good intuition, bad job at seeing the big picture. It takes about 10 successive rings to reach GEO using available material like kevlar as a tether.
The first LEO ring can have a second supra-LEO ring from which an elevator descends to the first, and so on, until reaching GEO. In this way, it is possible to construct a continuous elevator to GEO without invoking any unavailable material like carbon nanotubes.
That sounds fairly expensive and I don't see why that wouldn't throw all your calculations off with forces in the lowest ring.
Then again, I only skimped around the pdf.
The first ring would cost about $500B.
However, you can then use it to support a ~250 mile "rail gun" to get payloads to GEO at less than $1/kg. That drops the price of your (most expensive) GEO ring to about $5-10B.
Each ring built at lower altitude connecting GEO (second) to LEO (first) is successively cheaper (owing to being smaller). Total construction costs for a 10 ring system to reach GEO ends up being about $520B (inclusive of:) compared with $500B cost of the first LEO ring.
Doesn't happen.
youtube.com
You realize the whole point of a space elevator is to have the ability to have a space station in a zero-g environment for low-cost transport of space materials. Orbital rings are built so low that the gravitational force is hardly lowered. Learn to physics guy.
Orbital dynamics don't work like this. A ring in LEO needs to be rotating eastward at 9km/s or it's coming down. Orbits are not perfect due to masscons and other variations in the environment. It will perturbate and reenter.
Orion's Arm is a gaming site. Like Project Rho or Atomic Rocket, it's great inspiration but you need to fact check it before promoting an idea from it. >Good intuition, bad job at seeing the big picture. It takes about 10 successive rings to reach GEO using available material like kevlar as a tether.
Each of those rings is going to have a 600m/s difference in velocity, minimum. Plus the 9km/s delta on the lowest ring to surface.
Better options: Rotavator, Launch Loop, Bifrost, Airship to Orbit, Rockoon. Or just stick with reusable stages and optimize; this is still the best option.
1 muslim passenger with a bomb would destroy the project. We can't have nice things when people demand we think like them.
>It would mean that between the end of the year and around 2019, Tesla could have a level 4 autonomous system enabled in second generation cars – meaning the vehicles can drive themselves without a driver as backup, but not in all conditions or environment.
The African-Canadian-American wants to have fully autonomous "sleep while it drives" cars in two years
electrek.co
>1 muslim passenger with a bomb would destroy the project
This
Couldn't we recruit asteroids to build the first ring?
All we have to do is slow them down with solar sails (parachutes).
How the fuck would this thing not collapse? With the original space elevator, it has an anchor at geostationary orbit. The reason satellites stay in orbit is because they are orbiting much faster than the rotation of Earth. For this structure, the top of it would be rotating at the same speed of Earth, but below the geostationary orbit.
A correctly made space elevator has theoretically zero cost to bring payloads to space because there will also be payloads coming down from space to earth. The space elevator isn't really an elevator, it is a pulley that uses gravity as its engine. This idea is still much worse than an elevator.
HLI bro come back :(
>How the fuck would this thing not collapse?
this neckbeard has a great channel where he summarizes all kinds of futuristic concepts
get comfy
how does the energy get replenished that you take from the orbital ring by climbing the tether?
this
OP's opinion on space tech is about as credible as Bill Nye's opinion on transgenderism.
This orbital ring nonsense reminds of the people who say we should let nuclear waste 'drift' into the sun.
So we have figured out a way to break the dome surrounding our flat earth ?
Impressive !
This post is incoherent.
Orbital rings elevators give you cheap access to to zero g space station construction at any altitude. You can build rail guns on the rings to accelerate payloads into orbit at lower altitudes (like the space station) or simply climb the elevator up to GEO on a series of rings. Takes about 10 of them to reach GEO using kevlar as your tether material.
Beyond that, orbital rings serve a wide variety of useful purposes other than zero g platforms. For example, you can suspend communications satellites from a LEO ring rather than having them deployed to GEO.
Furthermore, you can suspend space stations from rings lower than GEO that *benefit* from not being in a zero g environment: much more comfortable for semi-permanent residence.
>Orbital dynamics don't work like this. A ring in LEO needs to be rotating eastward at 9km/s or it's coming down
Of course the ring is rotating. The elevator stays in place though. Works like a maglev train, except the "track" is moving instead of the "train."
If the earth is flat, why's it only cold in the middle and outer ring?
No muslim passenger with a bomb has taken down an airplane in decades, despite the need for security at thousands of entry points. The orbital ring has perhaps two dozen entry points (two dozen elevators), and you might only open one of these to the public. Easy to guard.
Even with that, masscons are going to warp that ring. I just don't see it working without unobtainium. It'd be easier to build a GEO elevator, even with the needed material research.
Not as impressive of an idea as it sounds. It would cost several hundred billion to recruit asteroids and then build industrial processing capability in LEO. Easier to use existing industry on the ground and swallow the few hundred billion cost of rockets to get it all up into space.
No real innovation is required for this project, whereas ushering in a space based manufacturing facility is without precedent even if doable.
Just some faggot who has done no research because i can't be fucked, but my question is why would the goverment lie about the earth?
YOU ARENT SPACE ELEVATOR STOP POSTING WITH HIS NAME YOU SULLY HIS MEMORY
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The ring is rotating rapidly around the earth. Only the elevator is stationary. See pic related.
The basic idea is that the top of the elevator acts like a gun. It is redirecting the ring's orbital path down at the point of "attachment" (and thereby generating lift for itself). The top of the elevator "rides" the ring like a train rides a maglev track. So, the ring can be spinning rapidly while the top of the elevator is stationary, sort of the inverse of a maglev track being stationary and the train moving rapidly.
What exactly are you going to build it out of?
wtf i love space elevators now
The elevator rides the ring in the same way that a maglev train works. You can impart additional energy into the ring in the same way that a track can impart energy into a train.
In a perfectly idealized system, maybe. Around a real planet, the perturbations are going to make it infeasible.
because of the suns path, it doesn't go near the center or edge
> assuming a space elevator is profitable
How come a greedy corporation hasn't built a space elevator?
The first ring is made out of a steel cable with aluminum track for electromagnets to work on.
Steel jacketed kevlar is more than sufficient for the elevator tether.
Ultimately, you want to replace such a design with a heavier but more robust construction in pic related.
Here, you see an outer sheath ring which would be stationary relative to Earth's surface. Inside the sheath, mass is rotating at some velocity in excess of orbital velocity. The sheath is continuously redirecting the inner mass stream downward as a result.
Ok, so at the points where the tethers connect with the ring there is some sort of magnetic energy feed? That means the tether is at the same time a high voltage cable to transfer energey up there?
I guess it's necessary since there is some remaining athmospheric drag, too.
btw: are you really SpaceElevator?
>moving mass stream
just type unobtanium next time
Wrong. Gravitational perturbations of a real Earth versus an ideal spheroid is a familiar problem that we already deal with. Consider, for example, ICBMs. In order to accurately target them, you need a very detailed gravity map to produce sufficiently accurate firing solutions.
The orbital ring is not any different. Basically what you have to do is generate a firing solution in terms of the angle of deflection applied to the ring by each elevator attachment so that it reaches the next elevator.
The deflection angle changing means that the lift on the elevator changes, but this is a free variable and of no concern. One need only consider that "dummy weights" can be attached or removed from the elevator at will, so that we are free to vary our angle of deflection while maintaining a net force of zero on the elevator.
No corporation has $500B.
No corporation has an army to defend such a large investment, even if it did have $500B to spend.
No corporation has the ability to gain permits for such activity from the variety of countries it would pass over, but the US government can simply do as it pleases.
We could go on, but any of these is a non-starter for private enterprise while being a non-issue for Uncle Sam.
You'd want to feed it with electricity from the ground at first, yes. This is only a temporary start up procedure though, as you'd quickly deploy massive space based solar arrays to generate electricity substantially below $0.01/kwh and feed that back to ground markets.
Don't be silly. CERN is essentially an identical albeit small scale version of the concept.
Easier in many ways: space provides a natural vacuum tube.
The total mass circulating in the LHC is pretty much nothing at all. You want a much higher mass and also in a linear accelerator? It won't be a vacuum tube for at least 100km.
Sounds completely retarded in every thinkable fashion.
If it's stationary, it's not in freefall - therefore no zero-g. The only way you can get zero-g in a stationary station is if its out at geostationary orbit.
If I'm at an altitude of 620 km, then I'm an average of 7000 km from the Earth's center. Since I have to stay above the same point on the Earth that means I have a tangential velocity of 510 m/s.
If I'm standing in this station, I experience an effective contact force, geff(r) = g(r) - ac = GM/r^2 - v^2/r
That gives me geff = 8.1 m/s^2, or 0.82 Gs
Not an argument. Same technology you need for CERN supports the enhanced orbital ring design. The power throughput, mass requirements, etc., are all detailed for you in Paul Birch's papers. The lowest you'd operate a ring is about 250-300 km, a fairly robust vacuum environment.
Incoherent post again.
You're not wrong, but you are not making an interesting point either.
We can accelerate payloads along the ring into independent orbit if you want a zero g environment in LEO, or simply ride the elevator up to GEO if you want a zero g environment there. There is no issue getting a zero g environment at any altitude, cheaply, with the elevator.
Furthermore, a zero g environment isn't always desired anyway. You might want this for scientific labs, crystal manufacture, etc., but in general you prefer to keep humans out of zero-g when possible.
>Orbital rings elevators give you cheap access to to zero g space station construction at any altitude.
>Orbital rings do not give you access to zero g conditions at any altitude
INCOHERENT! INCOHERENT!
Your reading comprehension skills, like your science literacy, are at the third grade level