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The Low Road to Alpha Centauri
Guest_DonPMitchell_*
post May 25 2006, 05:03 AM
Post #1





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OK, I'm in that unpopular camp that believes that the Breakthrough Propulsion Program should never be funded again -- we should not spend any money on Heim Theory, gyroscopic antigravity, space elevators, antimater engines, Bussard ramjets, black hole engines, UFO research, and zero-point energy. I have a radical alternative proposal.

Instead of using Wired Magazine physics to get to the stars, I'd like to use The Feynman Lectures physics to get to the stars. I propose building a craft powered by atomic fission. The engine would be a high-current linear ion accelerator, consisting of a superconducting niobium cavity resonator like this one, to get a nice healthy relativistic exhaust velocity.

[attachment=5855:attachment] [attachment=5854:attachment]

Next, we crack open a good book, like Taylor & Wheeler's Spacetime Physics, and figure out how long it would take to get a real spaceship to Alpha Centuri. What is the relativistic form to Tsiolkovsky's Rocket Equation? (OK, T&W does that for you) How much Plutonium would it have to carry? How much ionizable reaction mass?

I guarentee you, this hypothetical ship will get to the nearest star long before anyone invents a warp drive. Maybe I should ask NASA for $1.6 million, to develop this idea?
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Posts in this topic
- DonPMitchell   The Low Road to Alpha Centauri   May 25 2006, 05:03 AM
- - dilo   Interesting, Don. I do not recall similar idea on ...   May 25 2006, 05:29 AM
- - deglr6328   ....of course you know that linacs and synchrotron...   May 25 2006, 05:41 AM
|- - DonPMitchell   QUOTE (deglr6328 @ May 24 2006, 10:41 PM)...   May 25 2006, 06:46 AM
|- - dilo   QUOTE (DonPMitchell @ May 25 2006, 06:46 ...   May 25 2006, 05:53 PM
- - Richard Trigaux   QUOTE (DonPMitchell @ May 25 2006, 05:03 ...   May 25 2006, 08:06 AM
|- - ugordan   QUOTE (Richard Trigaux @ May 25 2006, 09...   May 25 2006, 09:21 AM
- - deglr6328   I guess possibly a superconducting linac (any curv...   May 25 2006, 08:27 AM
|- - Richard Trigaux   QUOTE (deglr6328 @ May 25 2006, 08:27 AM)...   May 25 2006, 10:48 AM
- - Stephen   QUOTE (DonPMitchell @ May 25 2006, 05:03 ...   May 25 2006, 10:35 AM
|- - Richard Trigaux   QUOTE (Stephen @ May 25 2006, 10:35 AM) ...   May 25 2006, 11:05 AM
- - Bob Shaw   Don: Never mind the stars - think what a decent p...   May 25 2006, 12:47 PM
|- - algorimancer   There's an easy and high efficiency option tha...   May 25 2006, 01:20 PM
|- - Chmee   QUOTE (algorimancer @ May 25 2006, 09:20 ...   May 25 2006, 03:59 PM
|- - ljk4-1   QUOTE (Chmee @ May 25 2006, 11:59 AM) A g...   May 31 2006, 08:32 PM
- - DonPMitchell   Fusion releases more energy, but fusion reactors d...   May 25 2006, 04:46 PM
- - AndyWard   How about Zubrin's Nuclear Salt Water Rocket? ...   May 25 2006, 06:13 PM
|- - DonPMitchell   QUOTE (AndyWard @ May 25 2006, 11:13 AM) ...   May 25 2006, 07:35 PM
- - Richard Trigaux   WAAAAAH! Its Zubrin, it's mad, and it work...   May 25 2006, 07:58 PM
|- - Stephen   QUOTE (Richard Trigaux @ May 25 2006, 07...   May 26 2006, 02:08 AM
- - remcook   I thought nuclear reactor were saver to launch tha...   May 26 2006, 08:28 AM
|- - Richard Trigaux   QUOTE (remcook @ May 26 2006, 08:28 AM) I...   May 26 2006, 11:06 AM
|- - DonPMitchell   Fusion power is great, I'm all for it. But so...   May 27 2006, 06:39 AM
|- - Bob Shaw   Don: VASIMR looks kind of sensible. Bob Shaw   May 27 2006, 12:15 PM
|- - DonPMitchell   QUOTE (Bob Shaw @ May 27 2006, 05:15 AM) ...   May 27 2006, 03:33 PM
- - newbie   >Fission reactors are up to about 50% efficienc...   May 27 2006, 06:11 AM
|- - Richard Trigaux   QUOTE (newbie @ May 27 2006, 06:11 AM) ...   May 27 2006, 06:32 AM
- - BruceMoomaw   Rather grim news on the space elevator front -- a ...   May 27 2006, 11:56 AM
- - BruceMoomaw   A MUCH better one (predictably) is Poul Anderson...   May 31 2006, 11:03 PM
- - jsheff   Here's another idea: As someone here previousl...   Jun 3 2006, 09:10 PM
- - DonPMitchell   It's interesting that 86 percent of the energy...   Jun 5 2006, 04:13 AM
- - ugordan   QUOTE (DonPMitchell @ Jun 5 2006, 05:13 A...   Jun 5 2006, 07:11 AM
- - DonPMitchell   QUOTE (ugordan @ Jun 5 2006, 12:11 AM) Th...   Jun 5 2006, 08:14 PM
- - ugordan   QUOTE (DonPMitchell @ Jun 5 2006, 09:14 P...   Jun 5 2006, 08:43 PM


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