From: g_d_pusch_remove_underscores@xnet.com   
      
   henry@spsystems.net (Henry Spencer) writes:   
      
   > Note that the function of a flameholder is partly to induce turbulence,   
   > which somewhat defeats your intent.  Gaseous fuel mixes burn much faster   
   > if you stir some of the combustion products back into the incoming mix;   
   > it's thought that they catalyze otherwise-slow steps in the combustion   
   > process.   
      
   Also, in most cases the flame-front speed is slower than the gas-flow speed   
   (this is one of the reasons a bunsen-burner flame has the shape of an acute   
   rather than an obtuse cone, and why you have to fiddle hard with it to get   
   the flame to jump down into the pipe). Hence, unless the combustion products   
   are recirculated to provide a continuous source of re-ignition for the incoming   
   fuel and oxidizer, the flame-front will simply blow out the back of the   
   engine...   
      
      
   -- Gordon D. Pusch   
      
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