Is it possible the vary the output of a MoveS or a Thruster?

As someone who likes to build planes and other flying stuff, the engines (thrusters and MoveS) are very unrealistc. It's just pressing a button to make the engine either stop or go to 100%.
I'd would love if I could vary the outputs, making landings and other possible flying machines possible to build and control.

I've tried to find either guides or workshop creations to see on how they work to no avail. (Although I've found tumayouzi's I-15 Poliparkov has a variable engine output, the way the aircraft was built is rather complex, making any understanding of it's thrusters, MoveS and power in general very difficult.)

By the way, I'm unsure if I should post this here or in general discussions, so I'm just leaving this here. (-_-')