Comments on: Black Holes, Starships and Antimatter http://crowlspace.com/?p=607 A Deep Future View... Mon, 16 Aug 2010 17:58:03 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: Adam http://crowlspace.com/?p=607&cpage=1#comment-5718 Adam Wed, 14 Jul 2010 09:51:09 +0000 http://crowlspace.com/?p=607#comment-5718 Hi Shawn Good to hear from you. Nice to get an update on the paper too. They're pretty tough at "Acta Astronautica" - can't imagine how Louis's Black Hole rocket would be received. I discovered, by accident, that Louis was trumped by Robert Freitas in his book "Xenology"... <a href="http://www.xenology.info/Xeno/17.3.5.htm" rel="nofollow">Total Conversion Drives</a> ...though, of course, Louis's quantum gravity theories might modify the figures significantly. Have you seen the recent paper on our Universe springing from a black hole? <a href="http://arxiv.org/abs/1007.0587" rel="nofollow">Cosmology with Torsion</a> ...by Nikodem Poplawski. Very interesting ideas, potentially neatly synergising with Louis's. Hi Shawn
Good to hear from you. Nice to get an update on the paper too. They’re pretty tough at “Acta Astronautica” – can’t imagine how Louis’s Black Hole rocket would be received. I discovered, by accident, that Louis was trumped by Robert Freitas in his book “Xenology”…

Total Conversion Drives

…though, of course, Louis’s quantum gravity theories might modify the figures significantly. Have you seen the recent paper on our Universe springing from a black hole?

Cosmology with Torsion …by Nikodem Poplawski. Very interesting ideas, potentially neatly synergising with Louis’s.

]]> By: Shawn Westmoreland http://crowlspace.com/?p=607&cpage=1#comment-5717 Shawn Westmoreland Sat, 10 Jul 2010 21:48:46 +0000 http://crowlspace.com/?p=607#comment-5717 Hello Adam. A revised version of my paper "a note on relativistic rocketry" has recently been accepted for publication in Acta Astronautica. One of the anonymous reviewers pointed out that the method proposed in my original preprint - about using thermalized gammas - had serious flaws. It was therefore removed from the final draft and will not appear in the publication. Hello Adam.

A revised version of my paper “a note on relativistic rocketry” has recently been accepted for publication in Acta Astronautica. One of the anonymous reviewers pointed out that the method proposed in my original preprint – about using thermalized gammas – had serious flaws. It was therefore removed from the final draft and will not appear in the publication.

]]> By: A Universe Optimized for Starships? http://crowlspace.com/?p=607&cpage=1#comment-5273 A Universe Optimized for Starships? Fri, 27 Nov 2009 18:26:33 +0000 http://crowlspace.com/?p=607#comment-5273 [...] Working with colleague Shawn Westmoreland, Crane has been exploring a different and far more speculative option for upping the energy extraction levels. What about using black holes for propulsion? Specifically, Crane and Westmoreland ask whether Hawking radiation from black holes can power a starship, calculating that a black hole of about a million tons would be just the right size, small enough to generate the needed Hawking radiation, while large enough to survive for the duration of a century-long star crossing. Adam Crowl has written fascinatingly about this in Crowlspace. [...] [...] Working with colleague Shawn Westmoreland, Crane has been exploring a different and far more speculative option for upping the energy extraction levels. What about using black holes for propulsion? Specifically, Crane and Westmoreland ask whether Hawking radiation from black holes can power a starship, calculating that a black hole of about a million tons would be just the right size, small enough to generate the needed Hawking radiation, while large enough to survive for the duration of a century-long star crossing. Adam Crowl has written fascinatingly about this in Crowlspace. [...]

]]> By: Carnival of Space 125 | Orbiting Frog http://crowlspace.com/?p=607&cpage=1#comment-5184 Carnival of Space 125 | Orbiting Frog Sun, 18 Oct 2009 16:28:04 +0000 http://crowlspace.com/?p=607#comment-5184 [...] Crowlspace relays some cool papers on starships and then speculates about photons bashing into mirrors. [...] [...] Crowlspace relays some cool papers on starships and then speculates about photons bashing into mirrors. [...]

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