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- From: alizard@pil
- Newsgroups: alt.pagan
- Subject: Re: Space: The Final Frontier
- Message-ID: <gate.8TRRwB1w165w@pil.UUCP>
- Date: Sat, 02 Jan 93 16:50:05 PST
- Lines: 126
-
- > From: bwhite@oucsace.cs.ohiou.edu (William E. White )
-
- >No, I think A.Lizard is right. I never got the impression that either he
- >or the people he talked to were talking about human payloads. The real
- >use of railguns and coilguns (I tend to favor the latter) are in payloads
- >like satellites, automated landers, even raw ore and minerals (thus the
- >idea of shooting off of the moon towards Earth).
- >And a lot of traditionalist rocket jocks are very much against it. But
- >not all. I remember hearing a NASA physicist talk about railguns and
- >coilguns, and he said that it's feasible NOW, just that A) non-manned
- >space activity is nowhere near as glamorous, B) a lot of people have too
- >much money in existing programs, and C) we still need better high-temp
- >superconductors.
-
- You are correct, I wasn't talking about human payloads especially, though if
- Pat Robertson wants to test a 1000+ g rail gun in person, I would feel morally
- unqualified to stop him from preaching the Gospel from the point of view of a
- pancake afterwards. (grin!) (moreover, a pancake floating in a solution of
- blood and gore... no, not Albert... if this ever happens, look for the GIFs
- in alt.tasteless, with cross references here to FTP sites, and for the
- nit-pickers around here, I have not stated any opinion as to whether Mr.
- Robertson is human.)
-
- Though a E/M (electromagnetic launch system) could be configured to
- accelerate a manned vehicle at a much lower acceleration level, using the
- railgun to replace the booster stage only, with upper stage Scramjet or
- rocket engines providing the rest of orbital velocity. This would improve the
- mass/ratio of rocket engines DRASTICALLY. Resulting in smaller, cheaper
- manned vehicles for getting into orbit with. We do need a manned space
- presence to make this concept work, (totally automated factories, like
- intelligent Christian fundies, are more heard of than seen) but we need to be
- able to get people into space in a much more cost-effective way than NASA and
- its contractors have sold the government on. We need to be able to get into
- space via common carrier at prices comparable to a conventional airline
- ticket.
-
- Could you dig this NASA physicist up and get him onto this newsgroup? In this
- case, I don't care WHAT his religious beliefs, if any are... if we are to
- settle this discussion even at the level of what to hit up our public
- officials for, we need some input from both the people Ashley cites and
- people who might be a bit better informed. And provide some discussion on
- differences between railgun vs. coilgun... If we are going to have a
- discussion of using technology to ensure and improve the future of our
- species, it might as well involve the most informed available people, and
- virtually all of these people are on Internet ... and most have access to
- this newsgroup. (last arbitron says that >60% of sites have access to
- alt.pagan.)
-
- Also, if anyone around here is involved with the beamed power proposals to
- the DOE coming from Alaska and Hawaii, PLEASE POST.
-
- As for high temp superconductors for E/M launchers, I regard them as:
- 1) helpful
- 2) fun
- 2) not actually necessary to build a rail gun, but VERY convenient... we can
- certainly do energy storage using traditional cryogenic temp superconductors.
- 3) part of what we can buy in the context of a multi-billion dollar
- investment in building rail/laser launch systems.
-
- >Let's assume you're accelerating at 8000 meters/second, which is easily
- >within range of railguns. This takes, of course, 1 second to get up to
- >speed; in that second we travel 8000 meters (simply enough). Now this is
- >cake, we can bend it into a logarithmic spiral for that matter. Heck,
- >8000 m/s is really slow for railguns but I'm assuming a heavy payload
- >and/or using a coilgun instead.
-
- And as for accelerating at 8000 m/sec/sec ... while this is fine for properly
- packaged bulk payloads (Orbital Transport Services was discusing comparable
- accelerations for sending things like liquid oxygen and hydrogen), I would
- have no faith in the safe arrival of my computer to orbit at 800+ Gs, even
- shipped in knocked down configuration, surface mount components would
- probably peel right off the board... depends on what one wants to ship, I'm
- interested in sending factory components in vehicles in the 1-10 metric ton
- range at about 25 Gs. (about 240 m/sec/sec) 25 gs is a compromise of total
- E/M launcher size vs. acceleration, the higher the acceleration, the shorter
- the track length. I want to be able to move things like semiconductor fabs
- into orbit with as little redesign and as much use of "off the shelf"
- components as possible. It's FAR cheaper to order stuff out of an industrial
- catalog than to use the traditional aerospace approach of custom designing
- everything.
-
-
- >From: pciszek@nyx.cs.du.edu (Paul Ciszek)
- >>Let's assume you're accelerating at 8000 meters/second, which is easily
- >>within range of railguns. This takes, of course, 1 second to get up to
- >>speed; in that second we travel 8000 meters (simply enough). Now this is
-
- >8000 meters/second is NOT an acceleration. It is a speed. This is not a
- >nitpick-- someone who does not understand the meaning of the terms
- >"acceleration", "velocity", and "speed" is not qualified to talk about
- >the feasablility of various launch techniques.
-
- >>Uh .... excuse me? Whoever said that we were going to accelerate at 9.8
- >>m/s^2? I mean, come on, a handgun accelerates bullets faster than that,
- Looks like bwhite@oucsace.cs.ohiou.edu (William E. White ) knows
- where the squared term in the acceleration equations go to me...
- I suggest you review your own qualifications, if any on this
- subject... a willingness to read a post befor blasting the poster
- would be a good start.
-
- And a private note to hz225wu@unidui.uni-duisburg.de (Micaela
- Pantke):
-
- I can recommend the following BBS, which offers Internet Mail Access:
-
- Maus Duisburg 1 & 2 Numbers: +49-2841-536777
- ???????? +49-2841-55275
- If the other system number I posted is too far from you to be
- convenient, I hope this is a bit better for you.
-
-
- Blessings...
- A.Lizard
- ====== 93 ====== sum saurus, sum saurus, sum maximus saurus! ====== 93 ======
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