Quote:
Originally Posted by TGLS
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/(20tanks))/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.