All these suggestions are good. My best contribution would be to think about what makes an engineer, and what makes an engineer a good engineer. I think the single most important thing is curiosity. In my case, I have an intense desire to know how things really work. I got hooked on this...
OK, if nobody else will admit it, I'll pipe up. Oaskar, I have no idea what you're talking (typing) about. Is this the lingo of pneumatic engineers? I'm a hydraulics guy and we rarely consider thermal expansion properties of the fluid medium. My concept of efficiency is useful power out vs...
Being a Sundstrand guy from way back, I have to ask why this application wasn't addressed with a closed loop system. Overall, a lot simpler using the pump/motor combination and PL adjustment to control tension. (?)