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This question already has an answer here:

After the battle in The Last Jedi when the ship activated its hyperdrive and tore through the Star Destroyer, I immediately began wondering why weapons weren't being made that utilized hyperdrives to push something really fast to be used as a projectile. What I'm wondering is how much it would cost to develop a weapon like this compared to other weapons in the Star Wars universe, and why such a weapon had not been created hundreds of years ago.

marked as duplicate by Valorum star-wars Feb 4 '18 at 11:44

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • You appear to have edited and marked to reopen. I'm curious how/why you feel that the dupe doesn't answer this question. – Valorum Feb 4 '18 at 12:36
  • Also see: scifi.stackexchange.com/questions/115994/… – Josh B. Feb 4 '18 at 21:18
  • this question is about why a weapon like this hadn't been developed hundreds of years earlier, not why the maneuver wasn't done earlier in the movie by other dead ships – cheesits456 Feb 5 '18 at 7:11