Tuning changes in 1.6 in Developer Articles Posted December 26, 2018 10 hours ago, Snark said: In that case, why would anyone ever use it? Ever? It would have nearly the worst Isp of any LFO engine in a vacuum, and not much in the way of thrust, either. Heck, a Swivel would beat it (higher Isp, higher thrust, much lower on the tech tree). As @Aegolius13 points out, KSP is a game, significantly simplified from IRL, and game balance matters. So if you tweaked the Wolfhound as you describe, then what reason would players ever have to use such an engine in their designs? Having historically accurate rocket parts suited to replicating the Apollo/Saturn V in function and appearance is a good enough reason to me, in a pack which is supposed to be a historical pack. I think the best game balanced Wolfhound would probably be around 370 s and 120 kN. Still overpowered by far for kerbal-scale apollo, but much better. Depending upon its cost and mass, it could still find a niche like that. The thrust is the most annoyingly high part of the wolfhound to me, that it literally beats an actual upper stage engine.