Wonders of Age of Steam: We selected seven
wonders from the 19th century that represent the
most amazing achievements of the age of steam
Engine - I was reading
about the VASIMR engine that Franklin Chang Diaz
is building and I read it has an ISP of 4000-5000
while a falcon 9 rocket built by SpaceX has an ISP
of only 300 and some. My question is what ISP would
a plasma ion engine need to lift off from the surface
of earth and make it to space.
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