Subject:
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Re: Where's all that gravity coming from?
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Newsgroups:
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lugnet.space
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Date:
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Thu, 8 Mar 2001 21:41:43 GMT
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Viewed:
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433 times
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In lugnet.space, Damraska wrote:
[snip]
> That's only the start of your problems. :)
[snip]
Here's another problem: with the conventional approach of acceleration via
some propulsion, artificial gravity is not your problem. The real problem
is shedding the excessive G's.
My numbers could be (way) off, but (assuming I'm right) if your ship
accelerates at a constant 1G for the first half the trip, and decelerates
at 1G for the second half, you can reach Alpha Proxima in about 2 years.
That's fine for an explorational crew, but it sucks for military or
commercial ships. The only way to get there faster is to accelerate
harder. Because distance traveled varies with the square of time, you've
got to accelerate 4 times as hard to get there in half the time. To cut
your travel time down to 6 months, you'll be under 16G accel/decel all the
way.
Ouch.
And yes, this is all ignoring Officer Einstein's interstellar speed limit.
Steve
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Message has 2 Replies:
 | | Re: Where's all that gravity coming from?
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| I'm going to chime in, and hopefully not get smacked down to hard. I read a book a whole bunch of years ago called The Forever War. I believe that the military was placing troopers in special suits and putting them all in basically giant vats of (...) (23 years ago, 8-Mar-01, to lugnet.space)
| | | Re: Where's all that gravity coming from?
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| (...) My figures (hasn't this been done in off-topic already?) note: 3e8 is 3 * 10^8 or 300,000,000 Proxima Centauri - about 9 ly away 1 year = 31557600 seconds, or 3e7 s c = 3e8 m/s (speed of light) 1 ly = 3e7 s * c d = Proxima Centauri = about (...) (23 years ago, 8-Mar-01, to lugnet.space)
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Message is in Reply To:
| | Re: Where's all that gravity coming from?
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| As some people have already pointed out, you can rotate just about any structure for artificial gravity--a drum, a torus, a rectangular box, or a box at the end of a boom (with suitable counterweight). The problem with this methodology is the amount (...) (23 years ago, 7-Mar-01, to lugnet.space)
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