Hello all,

i am currently designing a rocket engine for uni, and i had a few questions i could not get an answer anywhere else.

I am completely lost when it comes to fuel lines, and valves, i need to set my fuel lines, width but i dont know what i need to base the width on. i also have an inquiry about nozzle length, how do i define my nozzle length ? and how does it affect the engine.

thank you all again