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Space elevator design concept.

Unwardil

New Member
arg-fallbackName="Unwardil"/>
Ok, mostly I'm looking for the engineers and theoretical physicists views on why this is impossible and therefore why I have never heard this particular design for an intermediary space elevator ever proposed before.

Floating elevator segments held aloft by hydrogen gas bags all in a chain.

Basically, instead of trying to make a space elevator all in one go which everyone pretty much agrees is (a) Almost physically impossible with known materials and (b) totally impractical anyway because you'd have to get everything up into orbit first and then hang the damn thing like a Plumb from orbit.

I propose instead that you build from the ground up, using a chain of 500m (give or take) sections, each with their own independent elevator system that works on simple counter weights with regular ordinary stainless steel cable. (Im not sure what the most efficient length of cable is or even if steel would be what you'd want to use for this but basically, a regular elevator held in the air by hydrogen or helium balloons)

Each section would have enough flotation to support it's self and a small load, so that the more of these you added, the greater the height you could reach AND the greater the payload, as each section would take up a bit more of the weight. The very top section would probably end up floating around fairly randomly due to wind currents, but because the whole thing would be very elastic that wouldn't be a major problem and THEN you could build a much much smaller space elevator that reaches down to the altitude of this gas bag tower to pull things up into high orbit.

Thoughts on why this is totally impossible and therefore has never (to my knowledge) been proposed as a practical means of building a space elevator.
 
arg-fallbackName="seminone"/>
What you are talking about is a SpaceShaft and does not need to be a soft structure that wind will toss around.

To make the thing a rigid structure you just need to redistribute the mass being carried.

Typical science balloons (although very large) can carry up to 1/2 tonne of mass, other balloons with regular gondolas also have a mass that can be redistributed.

By using the mentioned mass a containing exoskeleton can be used to contain the inflated bladder while at the same time making it something like a building block that can then be used as a part of a scaffolding structure.

Once the the scaffold has been deployed to a certain altitude in can the be regarded as a regular antenna which then can be hold vertical and stationary, (i.e. without the effects caused by Coriolis,) by means of guy/mooring lines.
 
arg-fallbackName="lrkun"/>
Can you illustrate this, taking into consideration, the different laws of physics as well as how it could withstand environmental circumstances?
 
arg-fallbackName="Unwardil"/>
Mostly, I'm sure there are very good reasons why it's impossible, otherwise someone would have at least presented the theory before me. I'm curious as to why it's impossible.

The best verbal illustration I can give you is to imagine a vertical chain of blimps all tethered to each other and all of them to a huge anchor on the ground. Each blimp has some thrust of it's own, either provided through ground power or through solar cells installed on the gas bag shell, and each blimp has a counter weight elevator which joins each blimp to the next, allowing cargo to be pulled up or let down in 500 meter intervals. (I'm using the number 500 as a nice sounding round number, the actual number would have to be based on the most efficient length based on the strength to weight ratio of the cable being used for the elevator)

Basically the biggest design challenge with a space elevator is that of making it stand up under it's own weight. This would solve that problem by making the overall weight of the entire structure lighter than air.

The biggest problem I can foresee is keeping the top of the chain in a more or less stable position as high altitude winds would constantly be moving it around and those winds are a lot stronger than a solar powered thruster could counteract. Also, there's the sheering force as the elevator would pass through different atmospheric layers. But the elasticity of the structure should deal with that pretty well.

The other thing is that it wouldn't have to be an elevator to nowhere until it was attached to an orbital space station. All those high altitude winds could be put to generating electricity and I'm sure there's a bunch of other things you could do with a really really long antenna-like... thing. I'm at a loss as to what at the moment but oh well.

But that is basically the concept, fix the problem of weight in a space elevator by making the thing lighter than air.
 
arg-fallbackName="seminone"/>
The thing is being taken seriously by several scientific communities including the EuroSpaceward, ISEC, MIT. It is a rather new concept on its own but it can be compared to a spar-buoy used in the maritime environment. Google spaceshaft mit quine york university
 
arg-fallbackName="Unwardil"/>
Googled that and found it immediately. I figured if it was a halfway reasonable hypothesis that someone would be working on it. Looks kick ass.
 
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