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- Newsgroups: sci.space
- Path: sparky!uunet!wupost!udel!rochester!cantaloupe.srv.cs.cmu.edu!crabapple.srv.cs.cmu.edu!roberts@cmr.ncsl.nist.gov
- From: roberts@cmr.ncsl.nist.gov (John Roberts)
- Subject: Re: Bussard ramscoop
- Message-ID: <C0Curx.Du6.1@cs.cmu.edu>
- X-Added: Forwarded by Space Digest
- Sender: news+@cs.cmu.edu
- Organization: National Institute of Standards and Technology formerly National Bureau of Standards
- Original-Sender: isu@VACATION.VENARI.CS.CMU.EDU
- Distribution: sci
- Date: Tue, 5 Jan 1993 00:28:41 GMT
- Approved: bboard-news_gateway
- Lines: 35
-
-
- -From: lord@tradent.wimsey.bc.ca (Jason Cooper)
- -Subject: Re: *** BUSSARD RAMSCOOP ***
- -Date: 3 Jan 93 15:36:30 GMT
- -Organization: TradeNET International Trade Corp.
-
- -> Not good enough, alas. The pressure at the *center of the Sun* produces
- -> only the most sluggish hydrogen reaction -- one that will take billions
- -> of years to consume the Sun's hydrogen supply.
- ->
- -> Building the ramscoop itself is the easy part (difficult though it is).
- -> Getting the hydrogen to *do* something useful, once collected, is hard.
- -> Using it as reaction mass for an antimatter-powered jet engine is going
- -> to be much easier than trying to burn it raw.
- -> --
- -> "God willing... we shall return." | Henry Spencer @ U of Toronto Zoolog
- -> -Gene Cernan, the Moon, Dec 1972 | henry@zoo.toronto.edu utzoo!henry
-
- -Ah, but that would defeat the entire purpose of the ramjet itself! You
- -are now carrying around a mass of fuel equal to what you are going to tak
- -in in the scoop. Now we get into all of the standard limitations, as the
- -faster you want to go, the heavier the ship's going to get, the more fuel
- -you'll have to carry, the heavier the ship's going to get, etc. ad
- -infinitum. The *REAL* advantage of the ramjet is that this is not
- -happening. The fuel is just waiting out there, and it just so happens
- -that the faster you go, the more you're going to collect.
-
- A "conventional" antimatter drive uses millions of parts of ordinary matter
- for each part of antimatter. Thus if the main thing you carry along is
- the antimatter, you can still potentially benefit from gathering your
- reaction mass as you go.
-
- John Roberts
- roberts@cmr.ncsl.nist.gov
-
-