Davi SDF

There's also the R-56: http://www.astronautix.com/r/r-56.html A smaller, Soviet Moon rocket, with a LEO capacity of 40 tons, it would probably need orbital assembly to work as a Moon rocket, but the original Apollo project also needed orbital assembly. It would probably be around 3.75 meters wide in KSP, so it should be fairly easy to make!

No, SSPX has no life support requirement, it will only have life support mechanics if you add a life support mod

Today (well, not really today) i worked on an N-1 M V-II-III ! What is an N-1 M V-II-III?! Well, glad you (probably) asked! It's this thing! http://www.astronautix.com/n/n-imv-ii-iii.html A humongous, upgraded version of the N-1, that would put even the Saturn V's height to shame. Imgur post link: https://imgur.com/gallery/wQ4fkSt I really have no idea if the N-1 M V-II-III was something real, of if Astronautix just made it up, either way, i love the concept!

ASTEROID WILL KILL ALL OF KERMANITY! PREPARE YOURSELFES FOR 2026!

There are 3.5 and 5 meters half ring reaction wheels in the SpaceY lifters mod

Yes, keeping the system cooled can be hard, but even if it is a little heavier, it's worth it, specially if you extend the stage. You could also keep only the NTR cold, and refuel the S-IV in orbit, wich could help with avoiding radiators

Are you using separate heat loops? you should use one for the tank and another for the NTR

You should have CryoTanks installed, to get Liquid HL2 and Oxidizer

I see, i'm happy that you figured it out!

Hm, i don't know much about some of these mods, but that seems like a duplication issue, some mod seems to be duplicating the tanks but not hiding the old ones. I'm not familiar with some of these mods, sorry. But i would recomend removing one, opening the game, and see if that changes something, if not, repeat until you find the culprit.

hmm, that doesn't seem right, what are your mods?

It's saying you need to pay to unlock it, have you paid for it? It's carrer not Science mode.

well then, sorry, but my knowledge of waterfall problem solving ends here, someone that understands more than me might need to take a look in your log to get a good awnser

Hmm, do you have any mod wich could be incompatible with those?

Have you updated Waterfall? If so, try re-downloading and re-installing the latest version of Waterfall restock. Otherwise, try doing the same for both, that's my only guess.

what would be the problem? I'm using all Near Future Technologies mods and none of them are having problems

Hm... I'm having the same problem though, i have a INT-20 with 3 F-1As and a full S-1C fuel load, and it's TWR at sea level is 0.96 with 35 Tons of payload. I have an exact INT-20 (three F-1) build, am i missing something?

I think the mod Kerbonov has those Mk2 side Cargobays, pretty useful if used with Mk2 expansion.

What the Kraken is this SDLV?! It even has sn S-IVB on top of the Shuttle-C!

More likely to be the Stoke Rocket (it doesn't have a name yet)

FINALLY! I can play DooM in KSP! (Or in kerbal language, KooM? wait that doesn't sound right...)

You can try to gess the ammount of a certain propellant you will need by removing some of it from the tanks, the higher the Delta V, the more likely you are to have reached the perfect ammount. Otherwise, you can just try to calculate it, most of the time, its as simple as making a ratio (like how much Kerosene you will need for a given Hydrogen+Oxidizer tank).

Yes, the BDB Extra of J-2T400k

Are you using the normal J-2 aerospike or the J-2T 400k? The J-2 400k has no Waterfall plume, i changed that by just copying the normal J-2T plume and assigning it to the J-2T 400k.

A Saturn V launch? (or at least, some derivative from it)