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J Storrs Hall's Space Pier
#1
We have discussed this idea before, but I couldn't find a link - well here's one

http://autogeny.org/tower/tower.html
[Image: tower.png]
It's just a series of very tall towers supporting a linear accelerator. Something like a Lofstrom Loop, but with no loop, and capable of standing without a power supply. Some or many medium-to-hi tech worlds might use this approach for various reasons.
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#2
Here's a different take on this idea; http://writings.mike-combs.com/bridge.htm
It's basically the same linear accelerator but instead of tall towers it's supported by aerostats.
Evidence separates truth from fiction.
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#3
Space piers might be especially popular on smaller planets or gas giant moons. The lower gravity would mean a lower escape velocity and lower acceleration, making the launch phase much more comfortable.

I've seen the aerostat idea mentioned in passing in O'Neill's writings. I imagine that some worlds somewhere have done this.

Todd
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