The halo drive concept is interesting. It uses a beam of light to extract gravity energy from a black hole and use to to maintain acceleration of your ship. Al

The halo drive concept is interesting. It uses a beam of light to extract gravity energy from a black hole and use to to maintain acceleration of your ship. Almost no fuel needed because its really just a kind of extreme gravity assist that we’ve been doing since what, the 1970s? https://youtu.be/rFqL9CkNxXw https://youtu.be/rFqL9CkNxXw