Ares I stock replica
Just a quick build, wanted to know if it can work in KSP
spoiler alert: it can, but has so low TWR, that it needs to fly with ~50% fuel in second stage to get to orbit, still has good performance tho (1200+1600 m/s dV in 2nd+3rd stage on reaching LEO)
You can try carrying more/less fuel, but 50% seemed just fine, only tried 50% and fully fueled, which didn’t get very far