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PostPosted: Sat Feb 04, 2012 4:07 am 
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Location: The Maze of Peril
It's a floating drydock, rust, try Googling "ABSD-1"

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PostPosted: Sat Feb 04, 2012 9:18 am 
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Ah, thank you very much. :D


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PostPosted: Sat Feb 04, 2012 1:55 pm 
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That was wierd. It showed when I previewed it, but it doesn't show now for me either.
Let's try like this:

http://www.navsource.org/archives/10/16/1016012002.jpg

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PostPosted: Sat Feb 04, 2012 2:41 pm 
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Thank you very much, this one works well. :D

Yes, this is the kind of floating shipyard I could well imagine for
the setting's future, once the colonists begin to create their own
industry.


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PostPosted: Fri Mar 02, 2012 2:25 am 
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Location: the Retirement Coast, NSW, Australia
Unfortunately the square-cube law isn't on your side on this: lift, drag etc. are proportional only to the square of scale, but energy to be dissipated is proportional to the cube. Therefore aerobraking works well for small things, but really, really badly for big ones. Besides, the rigidity of ships is typically limited: they don't stand well any stress other than that of floating with equal support along their lengths. The devil of "enough ram pressure to crush the hull like an eggshell" might go swimming in the deep blue sea of "not enough ram pressure to brake the ship to a safe impact speed".

I'd consider filling the ship's hull with a temporary structure to strengthen it significantly during aerobraking, and then when it is "landed" recycling the material for compartments etc. Also, encasing it in a shell of light ablative foam to increase its air resistance. Or else landing it in pieces and assembling it on the surface.

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PostPosted: Sun May 13, 2012 10:21 am 
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Location: Sonthofen / Germany
Yep, the more I think about it the more difficult the project becomes. :?

My setting needs something more simple and less expensive, my next
weird idea to solve the problem is the "air mattress floater" described
in the neighbouring thread ...


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PostPosted: Thu Aug 01, 2013 10:28 pm 
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This is a little old, but it's worth looking at that picture of the floating drydock and then looking at the ISS.

How about several(say ten) more or less identical pontoons in much smaller dead landers. Once they're all in the water dock them together(like legos or space station components[press tab A firmly into slot B]), and bob is your uncle. A floating airstrip might look a lot like the dry dock. In the event of a storm, one could, if the undocking procedure were simple enough, separate the segments, or simply submerge the pontoons leaving only a smaller superstructure exposed on high stilts.

I may try this myself. My deep space drive is pretty soft sf, but interface craft are pretty much hard sf. Even with nuclear propulsion(depending on cultural mores about such things on garden planets), landing on an earthlike planet and getting back up can be involved.


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