I've made an engine by adding an empty gameobject in unity with the Z pointed in the direction of thrust and giving it a name. Then in your module section of the .cfg put the gameobject under thrustVectorTransformName MODULE { name = ModuleEngines thrustVectorTransformName = gameobject name exhaustDamage = True ignitionThreshold = 0.1 minThrust = 0 maxThrust = thrust heatProduction = 450 fxOffset = 0, 0, 0.8 PROPELLANT { name = LiquidFuel ratio = 0.9 DrawGauge = True } PROPELLANT { name = Oxidizer ratio = 1.1 } atmosphereCurve { key = 0 350 key = 1 300 } }