From: alanvj@nospam.mchsi.com.retro.com   
      
   On Thu, 15 Jan 2004 03:52:00 GMT, henry@spsystems.net (Henry Spencer)   
   wrote:   
      
      
   >>or burning your propellant and reinjecting that.   
   >   
   >Or variations thereon.  The original Arianes did some of their tank   
   >pressurization using turbine exhaust gas, cooled with water injection.   
      
   It was also proposed in the later Wasserfall designs, to eliminate the   
   stored gass pressurization.  Of course it did have turbines, ore   
   turban exhaust, nor the water cooling.   
      
   Alan   
      
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