This looks a lot like what was proposed back in the 70s by Adrian Berry in his book "The Iron Sun: Crossing the Universe through black holes": https://www.goodr

This looks a lot like what was proposed back in the 70s by Adrian Berry in his book "The Iron Sun: Crossing the Universe through black holes": https://www.goodreads.com/book/show/1091779.The_Iron_Sun https://www.goodreads.com/book/show/1091779.The_Iron_Sun