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Old 10-03-2017, 11:43 PM   #10
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Join Date: Sep 2004
Location: Southeast NC
Default Re: [Spaceships] simply fuel math...

Originally Posted by TGLS View Post
OK, if you want something more accurate, but more fiddly, then I think this is right. Take the natural logarithm of 20 divided by 20 minus the number of fuel tanks and divide by 0.05 (ln(20/(20-tanks))/0.05). This gives you the effective number of fuel tanks for that particular drive, so calculate your delta V from there.
If you want to be really pedantic, divide by ln(20/19) instead of 0.05. Assuming the table is accurate for exactly one tank, that will give you 1 = 1. It's only about a 2.5% difference, though.
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