The second video shows [Neil Wallace] talking about how the ion propulsion ... Ironically, NASA’s SERT ion engines, tested in the 1960s and 1970s used mercury as a propellant.

demonstrating thrust comparable to conventional jet engines. Tang’s approach differs from other plasma propulsion systems, such as those used by NASA. For example, NASA’s xenon-based plasma ...

MOSCOW, July 1. /TASS/. Russian and Belarusian scientists are discussing the prospects of jointly developing a plasma propulsion engine for spacecraft, Russia’s President Vladimir Putin said at ...