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Originally posted by djmolecular
5 mile long tube horizonatally on the ground, near the end of the line it changes to a short distance vertical tube????
non living cargo.
Also same priciple as the plane. Launch payload in accelrated tube... After launch, then use boosters to make it the rest of the way to orbit. Less fuel costs. I think the plane would be a better idea.
Originally posted by Phage
You mean something like this?
In the abstract, they propose a 100 km long evacuated tunnel within which a magnetic levitation system would accelerate a spacecraft to orbit speeds. Upon reaching the end of the tunnel, which would be roughly 5 kim above sea level, the craft would coast into orbit, using a small rocket thruster to even out its orbital path.
The additional acceleration forces involved in going in a circle could prove to be very uncomfortable.
Originally posted by LeeTheDestroyer
reply to post by above
Yeah, but what is the likelyhood of a linear elevator being built up the side of mt everest?
Initial construction costs are projected to be high (~$20 billion), which puts this kind of system out of reach unless a major corporating wants to stake its future on the project or a coalition of governments decides to get involved. Without seeing the plan, I cannot say whether there are opportunities to reduce the estimated costs. It is somewhat likely that the costs would increase. Plus, finding a 100 km long stretch of land where you would be able to construct the tunnel would be challenging.