TIE agility

TIE fighters, in order to save mass, had no defensive shield generators, no hyperdrive capability, and no emergency life-support systems. They were thus fragile, but fast, and that was fine with Vil. He'd rather dodge enemy fire than hope it would bounce off. There was no skill in piloting some lumbering chunk of durasteel; might as well be sitting with your feet up at a turbolaser console back on the ship. Where was the fun in that?

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Star Wars: Death Star Part 1 Chapter 1