This may be the Titan update, but the Atlas family isn't slouching around. The use of 1 1/2 stage balloon tanks allow them to stretch the performance of single-core liquid rockets to the absolute limit. Atlas SLV-3D, Atlas SLV-3X (stretched), Atlas CELV #ksp #kerbal #bluedog pic.twitter.com/BoXr3ZRu10

— Matthew Mlodzienski (@MattMlodzienski) September 19, 2019