home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!ogicse!das-news.harvard.edu!cantaloupe.srv.cs.cmu.edu!crabapple.srv.cs.cmu.edu!0004244402@mcimail.com
- From: 0004244402@mcimail.com (Karl Dishaw)
- Newsgroups: sci.space
- Subject: Aluminum as Rocket Fuel?
- Message-ID: <C08p16.Mts.1@cs.cmu.edu>
- Date: 2 Jan 93 18:36:00 GMT
- Article-I.D.: cs.C08p16.Mts.1
- Sender: news+@cs.cmu.edu
- Distribution: sci
- Organization: [via International Space University]
- Lines: 25
- Approved: bboard-news_gateway
- X-Added: Forwarded by Space Digest
- Original-Sender: isu@VACATION.VENARI.CS.CMU.EDU
-
- >Bruce Dunn writes:
- > This I like! Molten aluminum (melting point 660 C) can be kept in
- >steel tanks. Using molten aluminum will give a higher Isp than aluminum
- >metal.
-
- How's liquid Al going to work in the combustion chamber?
-
- --forming fine droplets will require a new injector plate--how did that
- work for the Li-F rocket Bruce mentioned? What kind of surface
- tension does LAl have? How small would we have to get the droplets to
- be?
-
- --will the LAl burn with LOX directly or will it solidify first and then
- react? The rocket's performance will be very sensitive to the
- proportion of Al that's burned, by the calculations I ran. I don't know
- how having a mix of liquid and solid aluminum would affect combustion.
-
- --the injector plate is going to need an internal heater to keep the LAl
- from solidifying as it passes through and to keep it clean for restarts.
- That's definitely going to be an imported-from-Earth item with all its
- other requirements.
-
-
- Karl
- sold my soul to Uncle Sam . . . now marked down for resale.
-