
Are lithium‑fed MPD thrusters the most promising near-term option for interplanetary travel?
It seems NASA is going all in on development of magnetoplasmadynamic thrusters since they really want the high efficiency of NEP with as high a thrust it can manage with that setup. So MPD seems the best option given those prerequisites. This honestly looks really promising, and makes me wonder if this will be the way we’ll be doing most interplanetary travel until we get fusion and/or beam propulsion going.