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Fraser
2017-Jun-18, 12:40 AM
Musk has published an essay that outlines his vision for colonizing Mars, which he unveiled last year at the 67th annual meeting of the IAC,
The post Elon Musk Details His Vision for a Human Civilization on Mars (https://www.universetoday.com/136060/elon-musk-details-vision-human-civilization-mars/) appeared first on Universe Today (https://www.universetoday.com).


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Hornblower
2017-Jun-18, 02:45 AM
... the booster would have an estimated lift-off thrust of 11,793 metric tons (13,000 tons) – 128 MegaNewtons – and a vacuum thrust of 12,714 metric tons (14,015 tons), or 138 MN. This would make it the first spacecraft where the rocket performance bar exceeds the physical size of the rocket.
My bold. Could someone explain, in appropriate mathematical detail, what this is supposed to mean?

Jens
2017-Jun-18, 07:54 AM
My bold. Could someone explain, in appropriate mathematical detail, what this is supposed to mean?

I can't, and I'm not absolutely sure that it means something...

Hornblower
2017-Jun-18, 11:13 AM
I can't, and I'm not absolutely sure that it means something...

That's what I was thinking. It reads sort of like, "My car's fuel mileage is greater than its length." Once again, anybody and his uncle can post something online, at little expense, without having it vetted for scientific soundness.

cjameshuff
2017-Jun-18, 11:42 AM
My bold. Could someone explain, in appropriate mathematical detail, what this is supposed to mean?

Possibly it's a garbled comparison of payload mass to vehicle mass, the actual physical height of the vehicles on the plot being a red herring (the dry mass of the booster is 275 t, the upper stage is 150 t, and the expendable payload is 550 t). It's not at all clear, it rather looks like some important information was a casualty of editing there.