Rectifier

I think there is a missunderstanding of the word gasturbine. The word "gas" in gas turbine don't refer to the used "fuel". Gas turbines, also known as combustion turbines, are feeded with a big variety of different fueltyps. This can be: natural gas, hydrogen, gasoline, diesel, oil, jet fuel etc.. The term "gas" in gas turbine refers to the process. Basicly in the combustion chamber the fuel is burned and the hot GAS is used to power the turbine. The Term gas turbine goes back, to differ them form the steam turbines. Even mechanical engineer students missused the term, as i recognized on the university https://en.wikipedia.org/wiki/Gas_turbine But this brings me back to your suggestion. Let's modify your Idea. As i said, gas turbines can be fueled with a big variety of fuel types. It would be good to have at least es few fuel options for this typ of engine, with an noticeable impact on the turbine, like in real life. And maybe you can use the boilerslot, but not for a boiler (cause there are no boiler), but for the combustion chamber type... This would be very easy to implement, cause it allready in the game and it would make the turbine a useable enginetyp - powerful but expensive - with some research options for the campain