RaptorFuel

So how do i use a natural logarithm? EDIT: Found a calc that had ln. http://www.eeweb.com/toolbox/calculator Thanks for all the info

I am trying to figure out Delta-V using your 3rd stage but I keep getting a different Delta-V then you got. I don't think I'm calculating ln right. I'm using a scientific calculator from http://web2.0calc.com/. I enter log(3.72/1.72) which gives me 0.335. Then I do the formula: 400*9.81*0.335 which gives me 1314. What am I doing wrong? Its been forever since I used one of these calculators.

I think the time might be off on the hohmann transfer orbit calculator. It says it should take almost 51 days to get to the moon.

I downloaded the latest. When i look at the version it says Version 0.7.