This time, I have made two functionally different second stages on the same 3 super heavy lift solid booster first stage. The second stage also uses two massive helium nuclear thermal rockets clipped together, and depending on the variant either has a large liquid fuel tank or massive cargo area with fuel tanks to lower the TWR to <=1.8. The Space Liner from my last post is placed for scale.
This rocket is the result of days of trial and error + a night of SFS lore creation surprisingly. This rocket is meant for realistic mode and attempts to be semi realistic. The first stage has two solid boosters and heavy lift chemical engines, and the second stage has two high efficiency chemical engines as well as two hydrogen nuclear thermal engines. It can comfortably get to low earth orbit for docking at a station for refueling, and from there get to the moon and mars (for Mars there will be another refueling station for further missions). It also has a significant amount of cargo space.
Should I drop the lore?