Basically what Simplerockets 2 has. Instead of prebuilt jet engines like the ones we already have, we should get one single customizable jet engine.

We could then open the properties menu of it and edit things like type (turbojet, turbofan, ramjet etc.), compression ratio, bypass ratio, afterburner power and throttle, nozzle type (civilian, military), fuel type etc.

Maybe even some more advanced settings like compression stages, combustion chamber size, fuel injection amount and more.

Having all of these settings to tweak, coupled with at least semi accurate sounds (or maybe even sound settings) and nice afterburner visuals is something we all want, so we can design more realistic planes and make them fly exactly how we want. I love this feature in SR2 and I hope you'll bring it over to SP soon! Thanks.