Subject:
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Re: Displacement Tonnage for Spaceships?
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Newsgroups:
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lugnet.space
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Date:
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Mon, 30 Dec 2002 15:48:59 GMT
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Viewed:
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390 times
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> True. Although if we want to be really accurate, then technically 'volume'
> and 'mass' are not the same thing. I am no science expert, so I don't know
> the specific jargon. But I am pretty sure on this point. ...Anyway, if
> someone were to measure as ship by volume, then I assume the units of cubic
> feet or cubic meters would be used. But what is the unit of measurement for
> mass?
mass= gram or kilogram.
(metric weight would be newtons, for standard it is pounds- both are used when
describing force.. ie. 15 pounds of pressure, 20 newtons of pressure).
In my own fake scifi world, I imagined that ships would be designated by their
gravitational pull. Remember that gravity is a function of the curvature of
spacetime due to mass (and mitigated by density[1]).
This would be important since so much of fictional spacetravel uses gravity in
some form (think gravity wells, blackholes, event horizons, etc), and the
ship's own gravity would be important in that regard.
How would this transfere into ABS? I guess by weighing the ships (because
earth's gravity is relatively constant, we can determine the mass). The
problem I have with Jon's SHIP definitions (which is essentially more than 100
studs in any direction) is what if we've got a ship that is 80 pegs by 80 pegs
(like the Zhang-he http://news.lugnet.com/space/?n=18806 ). Clearly such a
ship should be classified a SHIP, but it doesn't fit the 100 peg definition.
Or what if we've got a ship 4 studs wide, 5 bricks high, and 120 studs long?
Clearly not a SHIP, but fits the definition.
but weighing everything isn't always do-able in the easiest sense, so there
goes that idea... hee hee hee
-lenny
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Message is in Reply To:
 | | Re: Displacement Tonnage for Spaceships?
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| (...) I would agree that it is not based on any true science. Rather, I suspect hydrogen displacement was chosen because of the potential "sounds cool factor", since it sounds like a nautical term. Some sci-fi's (not all) like to draw comparisons (...) (22 years ago, 30-Dec-02, to lugnet.space)
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