03-16-2018, 09:33 PM | #31 |
Join Date: May 2009
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Re: Alcubierre warp drive
Then why was shrinking the ship and going into it mentioned?
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03-17-2018, 10:13 AM | #32 |
Munchkin Line Editor
Join Date: Aug 2004
Location: Austin, TX
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Re: Alcubierre warp drive
I just removed an off-topic tangent that was bordering on personal attack territory. I strongly recommend NOT going back down that road.
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03-17-2018, 11:51 AM | #33 | |
Join Date: Sep 2007
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Re: Alcubierre warp drive
Quote:
-- * Chris van der Broeck, "A `warp drive' with more reasonable total energy requirements". Sergui Krasnikov followed up that paper with a modification that reduced the requirement to a few milligrams. The infamous Harold White also had a paper that showed a reduction in matter requirements down to about 1000 kg. |
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03-17-2018, 07:31 PM | #34 |
Join Date: May 2009
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Re: Alcubierre warp drive
Harold White is infamous? Why? I've read about him.
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03-18-2018, 02:15 AM | #35 |
Join Date: Jul 2005
Location: Albuquerque, NM
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Re: Alcubierre warp drive
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03-18-2018, 12:16 PM | #36 |
Join Date: Jun 2013
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Re: Alcubierre warp drive
Infamous means being well known for something bad (in this case, controversial claims of creating a reactionless drive), it doesn’t mean “not famous.”
And this is an interesting thread, going to reread Luke’s post to see if it finally helps me understand the whole “FTL = time travel” idea.
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GURPS Overhaul |
03-18-2018, 02:24 PM | #37 | |
Join Date: Jun 2006
Location: On the road again...
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Re: Alcubierre warp drive
Quote:
And there's also the idea that plotting a wormhole means that you're creating a pathway between points A and B means putting B where you can observe it, not where you calculate it to really be. For example, calculating a wormhole between Earth and Alpha Centauri means making a 4.3 lightyear trip, which at c takes 4.3 years, but puts you where Alpha Centauri is in the sky, or where it was 4.3 years ago, and hence putting you 4.3 years in the past. Of course, some settings can (and should!) ignore this by saying that computations of the destination include taking proper motion and radial velocity of the target location into account, so that when you reach Alpha Centauri you are roughly where it really is when or after you left, or will be when the trip ends (if said trip is to take 3 years, where it will be three years from departure).
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03-18-2018, 02:39 PM | #38 | |
Join Date: May 2005
Location: Oz
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Re: Alcubierre warp drive
Quote:
It's best not to try to guess what the physics is here. With all due respect, if you haven't studied it, please don't try to explain it. Last edited by Agemegos; 03-18-2018 at 05:55 PM. |
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03-18-2018, 08:37 PM | #40 |
Join Date: Feb 2005
Location: Berkeley, CA
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Re: Alcubierre warp drive
It's basically a side effect of frame invariance. In relativity, if two events occur at different locations, two different inertial reference frames can disagree about which event came first. Thus, if you have a means of changing from one reference frame to the other, and you can travel between those two locations in less time than the disagreement, you can travel backwards in time. The disagreement, if you pick your frames correctly, can be any value less than the time it takes for light to travel between the two locations.
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