
In the end, he built out 13 different engine concepts, including fusion engines-like The Expanse's Epstein drive is theorized to be-fission engines, and antimatter rockets. “That was super fun, which might be a super nerdy statement, but you know.” He crunched the numbers, considered how much power a specific engine would need, how to deal with the heat produced, and how you’d harness the energy to propel the virtual rocket further. “You need to kind of think a little bit critically about what people have hand waved.”



“Everybody tries to sell their project as the propulsion system of the future,” says Adderley.
