I hope someone can help. I'm at my wits end here. I'm trying to get to Duna, but I keep on running out of fuel. All the maps, wiki's, etc. only specify how much Delta V is needed. Well, that's pretty useless. I have a 13-stage rocket to get me there - each of the stages has twice the required Delta V for that stage (so I can do a return mission). None of the calculators specify how much TWR/Thrust is needed. To explain: I have a Delta V of 1123 to break away from Kerbin orbit. This should be enough to reach a Minmus transfer. But how much TWR/Thrust do I need to break orbit? I have a TWR of 1.44, so that should be enough. Oh no. I run out of fuel after 1m 15s. And please don't tell me "you need more fuel". I could stack every fuel tank in the game together, get a kazillion Delta V, but if my TWR/Thrust isn't enough to break away from the gravitational pull, all that Delta V means squat! So, is there a calculator somewhere that tells me for my vessel mass, who much Delta V AND TWR is needed for each stage. Any help please, because this is turning the game into all frustration and no fun/entertainment.