Jet Engine Power Multiplier in XML??

The old engines (and the current ion engine and rcn) are possible to tweak in the xml but the rocket engines and jet engines are parametric. You can add values out of the bounds of the designer to get more powerful parts though

@Insanity HHHmmm... I see that ive seen a wwrong thing reading some stuff

This isnt simple planes, theres many factors influencing the thrust of the jet engine.