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- From: roberts@cmr.ncsl.nist.gov (John Roberts)
- Newsgroups: sci.space
- Subject: Re: Aluminum as rocket fuel?
- Message-ID: <C0ByIB.9DI.1@cs.cmu.edu>
- Date: 4 Jan 93 12:53:04 GMT
- Article-I.D.: cs.C0ByIB.9DI.1
- Sender: news+@cs.cmu.edu
- Distribution: sci
- Organization: National Institute of Standards and Technology formerly National Bureau of Standards
- Lines: 33
- Approved: bboard-news_gateway
- X-Added: Forwarded by Space Digest
- Original-Sender: isu@VACATION.VENARI.CS.CMU.EDU
-
-
- -From: Bruce_Dunn@mindlink.bc.ca (Bruce Dunn)
- -Subject: Re: Aluminum as Rocket Fuel?
- -Date: 4 Jan 93 00:27:49 GMT
- -Organization: MIND LINK! - British Columbia, Canada
-
- - Sorry for the sloppy wording. I meant rather "when there is melted
- -aluminum in the tank". I am envisioning a system in which aluminum is
- -premelted, possibly in a solar furnace, and poured into an insulated
- -tank/valve/combusion chamber unit. The aluminum will bring the whole system
- -up to temperature, and melt any residual aluminum from the last firing.
-
- Getting an aluminum engine that will work in single-use mode is the first big
- step. Making one that can be restarted and reused is a significant further
- challenge, which is not necessary to putting aluminum engines in service for
- launch from the moon.
-
- -I expect that it won't be too hard to insulate the assembly well enough to keep
- -the temperature above the melting point of aluminum for days. I don't think
- -that a heater will be required.
-
- That's probably correct, though you need to watch out for the possibility
- of chemical reactions and leaks when storing molten aluminum for long periods.
-
- -If heating is required for long term
- -operation, the logical thing would be to admit a small amount of oxygen into
- -the fuel tank to react with the aluminim and heat it.
-
- If you do that, there's a very good chance you'll clog up whatever you're
- using to inject the aluminum into the combustion chamber.
-
- John Roberts
- roberts@cmr.ncsl.nist.gov
-