I'm very unclear how you would attach 6 of the little Oscar-B tanks. I'm not sure how to make it show vac values, like you say, so a little help there? In fact, I half empty the tank, and still have 2,122m/s. When I pulled the Terrier off, and put on a Spark, my dV jumped to several thousand. I'm going to slow you down just a bit so I make sure I completely understand. On the return trip, you need the same delta-v used to get there, except do not include the launch 3400 m/s, because you aerobrake for landing. For launch you add up all the delta-v values to get into low Mun orbit. Start from the pod that splashes down, that's your final "payload" mass. You repeat the whole process for the "orbiter" that you need to get up there in order to bring the Kerbals back. Others have much more experience than me. Also, set the VAB's DV tool to display "vacuum" values - the 3400 m/s standard for orbit is in vacuum values.Īt least, it works for me. Note that when you build the rocket in the VAB and attach the lander to it, the built-in DV tool is going to add the lander's delta-v to the total values displayed. So maybe design the booster for 5,000 m/s total.
#KERBAL SPACE PROGRAM HOW TO DO MUN PART 2 TUTORIAL PLUS#
Its delta-v requirement is 3400+860+310=4600 m/s (approx), plus whatever margin you need for pilotage skills. That total mass then becomes the "payload" mass for designing the rocket that gets the lander up to orbit. Total mass: 3.05 tons, dv = 1569 m/s, TWR = 0.67 (that's plenty for launching from the Mun) Using a rocket design tool (like "KSP Optimal Rocket Calculator"), plug in 1400 m/s for min delta v, lower the min TWR to 0.3, and select "Kerbin" for the local gravity (even though you're landing on the Mun, the Isp of the engines is measured on Kerbin), disable the "add decoupler" option, and it coughs-up this design: Since you have to boost the lander into Mun orbit from Kerbin, you want the mass to be as small as possible.Īssuming the "payload" part of the lander is the 2-Kerbal pod (dry), plus science parts, plus the docking port, batteries, solar panels, and landing legs amount to a total of 1.6 tons.
I totally agree with starting from the lander and working backwards.Ī Poodle is excessively large engine-age for this task. This is happening with both the short and long clamps. They seem to snap in close if I try to move them from center, and then they don't later detach. and I'm having some trouble getting the SRB to attach to the clamps anywhere but in the middle. Last, per Harry's comment, I'm not sure which direction is North when I'm in the VAB.
I know I'm reading this a bit wrong, since clearly it doesn't take 3,400 to come back down from orbit, so some explanation would be appreciated. I have RCS on it for docking with craft #2. I'm thinking of this correct, yes? This mission will end with the rescued Kerbal in the second seat, and in Mun orbit with my pilot. And finally, I'll need to build a booster stage with 3,400 to get off the ground into orbit. Would I add additional fuel? A different engine?įrom there, again looking at the map, I'll need a second stage with roughly 1,200dV to leave Kerbin orbit, and enter Mun orbit. If I want to have this craft in orbit, I'll need 580 dV to get safely down, and another 580 to get back up, correct? Plus, extra since I'm new-ish. I'm trying to work backwards on the dV map. This lander has a poodle engine under it, and a dV of 967 (according to the VAB readout). Right, so then change of plans, like Jan suggests.
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