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Reddit mentions of Deep Space Propulsion: A Roadmap to Interstellar Flight (Astronomers' Universe)

Sentiment score: 1
Reddit mentions: 1

We found 1 Reddit mentions of Deep Space Propulsion: A Roadmap to Interstellar Flight (Astronomers' Universe). Here are the top ones.

Deep Space Propulsion: A Roadmap to Interstellar Flight (Astronomers' Universe)
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Release dateNovember 2011
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Found 1 comment on Deep Space Propulsion: A Roadmap to Interstellar Flight (Astronomers' Universe):

u/jdrch ยท 1 pointr/printSF

> No, before the protomolecule they are scooting around the solar system at 1g (fucking fast) with nothing but a fusion drive.

    1. To be fair, Corey never specifies exactly how the fusion drive works, except that it uses pellets. That last detail suggests inertial confinement fusion.

      That said, he does mention powerfully damaging (from an charged particle radiation perspective) engine exhaust from said engines in Caliban's War.

    1. Per Deep Space Propulsion: A Roadmap to Interstellar Flight, (some) fusion drives using "currently extrapolated" (note my quotes) have delta-V (maximum velocity change) budgets of ~26 000 km/s.

      Assuming any such spacecraft would also have to brake using its onboard engines and fuel, its max velocity would be 26 000/2 = 13 000 km/s. A simple v = u + at calculation reveals that it take 369 hours, or 2.19 weeks, to reach that velocity at 1 g.

      Ergo, it's not implausible to spend nearly a month and a half at 1 g acceleration on a fusion drive vessel :)

    1. Even if the drive itself were reactionless, that's not necessarily unrealistic. Per Discover Magazine it's quite possible due to quantum effects that can be taken advantage of.

      I think a common mistake many hard sci-fi fans make is assuming that rocketry will never advance beyond Newtonian propulsion when in fact we take advantage of non-Newtonian behavior in our daily life when we use computers and most electronics. The only reason we haven't seen similar advances in propulsion is the political reasons behind the space race went away, and with it much of the funding and fanatical drive (no pun intended) for intensive space exploration. But that's another discussion :)