Midnight Zephyr

The Midnight Zephyr is one of a handful of fusion-driven spacecraft I'm designing for my setting that ferry supplies and people between Earth's Moon and the orbital habitats of Saturn. A typical flight plan starts with 18.5 days of gentle, constant acceleration, followed by over 140 days coasting in freefall before flipping around and burning for another 18.5 days to break into orbit around Saturn. These spacecraft carry only enough fusion fuel for one leg of the round trip, and must refuel at Saturn to return to Earth. Rather than using more traditional solid radiator panels, the heat from the fusion rocket is instead dissipated by an advanced liquid droplet radiator system which sprays a thin sheet of molten lithium droplets that rapidly shed their heat into the vacuum of space before being collected and recycled.