Comment Re:not sure I get how this helps human travel (Score 1) 134
For the lazy among us, here a link to a velocity calculator. https://www.calculatorsoup.com...
s = (v^2 - u^2) / 2a
where:
s = distance
v = final velocity - orbital velocity = 7800 m/s
u = initial velocity = 0 m/s
a = acceleration m/s^2
So for a constant 10 g acceleration (questionably survivable for humans for that period of time) it would require a railgun barrel 310 km long. Are the Chinese really trying to put a 737 sized spacecraft into orbit with a railgun? Plus, the article first describes a coil or gauss gun. Something very different than a railgun. Makes me think that the author doesn't have a clue about wha the is talking about.