Now, we'll add some pipe sections to the engine. We'll start with Torus object for this, the same way we did with the gun model. Just like before, we can cut sections of the pipe. In this case, I've cut the front part in half, then placed the 3D Cursor in the middle:
Then, I can rotate one side by 90 degrees around the 3D Cursor, giving me a nice bend to my pipe:
I'll first create one larger pipe section across the back of the engines, sort of like a roll bar (though of course, a spaceship wouldn't really need a roll bar):
You can then create a variety of pipes going into whatever places you feel are appropriate. I'm going to add little copper connections to the ends of mine. Since they're so small, I'm not going to worry about beveling:
As we do this, you can also add small boxes or circles to connect various parts together:
You don't always need to use right angles, either:
In the end, here's what I ended up doing with the pipes:
