WipeoutMan

@AerisPrime, maybe you're using FAR? I know the latest version cuts the thrust of all air breathing engines by half. From FerramAerospaceResearch.cfg: @PART [*]:HAS[@MODULE[ModuleEngines*]:HAS[@PROPELLANT[IntakeAir]]]:BEFORE[FerramAerospaceResearch]:NEEDS[!AJE]{ @MODULE[ModuleEngines*] { @maxThrust *= 0.5 } }