xman, what mod do you have installed? Going from the picture, I want it.
Here is the 3rd generation of my best design so far. It's first set of engines can get it up to about 150,000m and over 1000m/s, but its not easy to get it to orbit. The game also likes to re set the staging sequence on me so more than once I've gotten it up only to accidently jettison half of it when I try to dump empty fuel tanks.
I almost got it to the moon once, but I messed up the time warp and somewhat overshot it, and ran out of fuel. Almost made it back but Mun pulled me off course so rather than get pulled back planet side, I lost my crew to the black of space.
Trying to think of a way to give the first engines more fuel, without sacrificing my second stage or making the craft rediculously unstable once the fuel tanks start drying up (this is why the side boosters have one less tank. If I give it the whole four even autopilot can't hold it, though I might try more SAS)
And the solution to my problem...the mark IV.
Part of it is me getting better, but this one managed to make a crater on the moon (didn't start braking even close to soon enough, and impacted at a breezy 400m/s down from my 600m/s approach). And it did it even with a broken ejection sequence. Stage 1 and its 6 liquid fuel boosters achieve altitude (being careful not to snap the rocket with G force towards the end of the life of the boosters, since it can really
put the hammer down with all 9 running full bore once the air resistance starts to vanish). Then stage 2 sets and breaks orbit, stage 3 for space controll (mostly braking so that I can wait for the moon), and ideally stage 4 has enough power and fuel for a controlled landing.
Then my little Kerbal Nauts will freeze or asphyxiate (not sure what will run out of power first) because there won't be enough power to leave Mun, unless it has much lower gravity than I am expecting.
EDIT: Found myself a lunar lander mod, which honestly made everything a bit harder by giving me less efficient engines and itty bitty gas tanks. But the pieces look nice. I advanced and played around with my design and ended up with what I am calling the Thor, and its Lunar Lander module, the Summoner. I did goof with the landing though by landing on the wrong part of the moon. If I had taken off with the decent engine and its double fuel tank (I didn't want to run out, and while the tanks may hold only prayers, they are super light), it probably would have had enough fuel to position me to a point where the accent engine could make it back to Kerb. Instead, it just kinda floated away. No issues breaking away from Mun though. I also noticed while sitting on Mun that re-landing would be an issue as the parachute can only hold up the command pot itself, but there is no seperation joint between that and the accent engine and fuel tank. Even with an ocean landing, it probably wouldn't have survived the victory landing.
The Thor Rocket: 6 boosters - 3 engine stage 3 - 1 engine stage 2 (handles breakaway, trajectory control and primary Mun approach) - 1 gimbaled engine stage 1 (handles final approach and decent to Mun) - 1 decent engine for landing - 1 accent engine to try and hit Kerb with.
We made it: