From: spacr@comcast.net   
      
   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!   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)