MIF drive

A Magneto Inertial Fusion (MIF) drive or MIF engine is a form of pulsed fusion propulsion used by many interplanetary spacecraft., providing efficient and sustained acceleration in space.

These drives ignite a small fusion fuel pellet to start a fusion reaction that interacts with the strong magnetic fields in the drive, which acts something akin to a spring, pushing the craft forwards. These drives can also inject water into their exhaust, generating even more thrust.

MIF drives are only practical for traversing interplanetary space. Although they are quite efficient, the average ship equipped with one of these engines only carries roughly forty days of fuel pellets, and even less water for propellant. For this reason, large carrier spacecraft equipped with FIT Drives are needed to ferry smaller craft through interstellar space.