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A comment on Why Bezos’ rocket is unprecedented–and worth taking seriously. Parent comment

Re:Why Bezos’ rocket is unprecedented–and worth taking serio... by dogma1138 on Tuesday September 13, 2016 @01:19PM (#12490330)
That's 67GJ per KG? because otherwise either I'm very very wrong, or they are very very optimistic.
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Re:Why Bezos’ rocket is unprecedented–and worth taking serio... by dsp1234 on Tuesday September 13, 2016 @01:26PM (#12490391)
Looks like that's for a 300kg total weight projectile @ 20% energy efficiency. Details can be found on page 317-318.
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