04-13-2014, 06:17 PM | #101 |
Join Date: Mar 2013
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Re: [Space/Spaceships] Getting the velocity/Delta V I want with the tech I want
Well, Ulzgoroth, given that the ships I've designed need no fuel.
That said, I do have shipping costs now. The price to ship one ton 136 AU is $13,000 while the shipper is still in hock to the banker and $2,500 when the banker's of his back. Orbit and back comes to $10,000. Note that these are cost to shipper values for the most part, the second 136 AU might actually come close to what people pay |
05-08-2014, 05:16 AM | #102 |
Join Date: Mar 2013
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Re: [Space/Spaceships] Getting the velocity/Delta V I want with the tech I want
I've been playing around the numbers some more, and have some updated figures. Mainly by noticing a way to game the system, it's not much, but it helps. Won't stand up in reality, but for a game it's good enough (Cramming 10 fuel tanks into the space of 9 is a physical impossibility)
At worst the fuel to ship a ton into orbit is ~$4,700 per ton, or $2.12 per pound. Shipping between the two stars cost the company less then $7,000 per ton, or $3.09 while the ships in hock to the bank, or ~$1,100 per ton or $0.51 when the interests paid off. So it should cost NO MORE then $15 to ship a pound of something between the two stars, at maximum. For reference I looked up the Australia Post costs to ship stuff, the lowest rate to the US for 500 grams (about a pound) is $10.50, and that's by sea, air freight seems to run to about twice that |
05-08-2014, 05:40 AM | #103 | |
Join Date: Aug 2004
Location: Binghamton, NY, USA. Near the river Styx in the 5th Circle.
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Re: [Space/Spaceships] Getting the velocity/Delta V I want with the tech I want
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__________________
Eric B. Smith GURPS Data File Coordinator GURPSLand I shall pull the pin from this healing grenade and... Kaboom-baya. |
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05-20-2014, 12:22 AM | #104 | |
Join Date: Mar 2013
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Re: [Space/Spaceships] Getting the velocity/Delta V I want with the tech I want
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Sum the L/R^2 values for the stars other the planets primary, take the quad root and multiply by 278, then add that to the heating value from the primary, or do I sum the L/R^2 for all stars including the primary, take the quad root and multiply by 278? |
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05-20-2014, 12:32 AM | #105 | |
Join Date: Feb 2005
Location: Berkeley, CA
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Re: [Space/Spaceships] Getting the velocity/Delta V I want with the tech I want
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05-20-2014, 01:05 AM | #106 |
Join Date: Mar 2013
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Re: [Space/Spaceships] Getting the velocity/Delta V I want with the tech I want
OK, that' reducing the heating effect of the other stars to pretty much nothing, does that sound right?
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Tags |
interstellar trade, magsail, space, spaceships |
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