From: b.dot.teasley@insky.com   
      
   WOW!   
   	And to think, we in Oklahoma just decided o invest a few   
   billion dollars in space plight.  I am here worrying if I should   
   upgrade Kerosene to Propane!   
      
   Anyone anxious to promote science (including, after reading yur post,   
   a state like Oklahoma that subsidizes space flight) obviously has   
   those replacement parts made of Silicon.   
      
   	Thanks for the heads up!   
   	I'll use your quote to vote against the future.   
   			Bill   
      
      
   On Sat, 31 Jan 2004 00:26:16 GMT, "spacr"  wrote:   
      
   >Hahaha, ROFLMAO...   
   >   
   >Balls of STUPIDITY...   
   >   
   >As one of the few living people to have ever burned 90% H2O2 with AlH3, I   
   >can state emphatically...   
   >JOHN, earth to John, remember when I warned you about getting someone killed   
   >one day? H2O2 + AlH3 will be that day!   
   >Unless you clean your H2O2 til it is electronics grade or better AND you   
   >have complete quality control on your AlH3 production to ensure that it is   
   >100% pure AlH3, I GUARANTEE you that this mixture will be hypergolic.   
   >Even if you could acheive the level of quality control to get pure H2O2 and   
   >AlH3 (your actions to date show this to be highly unlikely) alumina partices   
   >created in the decomposition would destroy any catalyst bed in under 60   
   >seconds. Nozzle throat errosion with high percentage loadings of AlH3 would   
   >also be a significant issue.   
   >Since you have started down the AlH3 path, I'll give you a freebie. Start   
   >thinking about a hybrid motor, H2O2 as the liquid oxidizer and a mixture of   
   >AlH3 with 5%-15% solid hydrocarbon as the solid fuel grain. I'm sure if you   
   >asked nicely, and threw a little cash his way, Bevin McKinney could bring   
   >you up to speed on hybrid grain design. Nasa Lewis did some theoretical   
   >studies on H2O2-AlH3-hydrocarbon motors in the 1980's and early 1990's. Most   
   >of the work was headed up by: Bryan.A.Palaszewski@grc.nasa.gov   
   >   
   >I'll go back to lurking in the shadows now...   
   >   
   >As Always,   
   >   
   >Jay Troetschel   
   >   
   >"Oren Tirosh"  wrote in message   
   >news:cf052f0d.0401271520.38b1bf8a@posting.google.com...   
   >> Earl Colby Pottinger  wrote in message   
   >news:<1018784htdjos4e@corp.supernews.com>...   
   >> > henry@spsystems.net (Henry Spencer) :   
   >> >   
   >> > > In article ,   
   >> > > John Carmack  wrote:   
   >> > > >...If you mixed powdered AlH3 into 98% peroxide... modest   
   >> > > >modifications to our X-Prize vehicle to make an SSTO filled with   
   >that.   
   >> > > > Probably fearfully explosive, but it would be worth some carefull   
   >> > > >testing to see...   
   >> > >   
   >> > > The mere suggestion is enough to make me want to dive for cover. :-)   
   >> > > Especially since, if memory serves, the standard preparation process   
   >> > > for AlH3 leaves some organic solvent in it.   
   >> >   
   >> > Flying a X-Prize class rocket = Balls of Brass.   
   >> >   
   >> > Flying a 90%+ H2O2 rocket = Balls of Iron.   
   >> >   
   >> > Flying a mixed Alcohol/Peroxide rocket = Balls of Steel.   
   >> >   
   >> > Flying a mixed AlH3/98% H2O2 rocket = Balls of ?????   
   >>   
   >> Unobtainium, naturally!   
      
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