It's not SciFi...
#1
It's not SciFi...
"Johnson Space Center has been leading the development of a high-power, electrothermal plasma rocket — the variable- specific-impulse magnetoplasma rocket (VASIMR) — that is capable of exhaust modulation at constant power."
Nasa Tech Briefs - Variable-Specific-Impulse Magnetoplasma Rocket
Info like this is humbling.
Nasa Tech Briefs - Variable-Specific-Impulse Magnetoplasma Rocket
Info like this is humbling.