KSP Version: v1.0.0.830 Windows (steam) What Happens: The center of mass are out of the air-breathing engines, making difficult to build small planes Mods / Add-Ons: All Stock i tried to uninstall/install and go back to the beta version et repatch to the 1.0 version (the beta version didn't have this probleme) and it didn't solve the probleme. it looks like this (it's the same for basic the jet engine and turbofan jet engine): (if more information is needed don't hesitate to ask me )