Gravity drive

The gravity drive is a propulsion technology developed on Tetro 121 million Earth-years ago that allows spacecraft to effectively travel faster than the speed of light when surrounded by complete vacuum. It consists of a particle accelerator which causes a controlled chain reaction of particle collisions that selectively displace the gravitons within a shell of superconductive material that lines the fusellage of the vehicle. This displacement warps the space-time around the craft, compressing the space ahead and expanding the space behind, allowing the craft to cross vast distances with minimal thrust from a hydrogen turbine.