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What happened to VASIMR?

Apr 20, 2021
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What ever happened to AdAstra Rocket's VASIMR Plasma Rocket?

It's been 13 years since NASA and AdAstra signed an agreement to put a VF-200 test rocket on the ISS, and since then? Very little has taken place. Shame. The VASIMR engines are power hogs, and they require a ton of power (in the MW range for Mars flights); but with all the advances being made in solar, battery storage, and small-scale nuclear reactors, shouldn't NOW be the time for VASIMR's to be seriously considered by our new leaders of the race to space (SpaceX, Blue Origin, etc...)?
 

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