From: jfindley@cinci.nospam.rr.com   
      
   In article <7a4555f4-b44b-4c97-a98c-3b4f249b5f48n@googlegroups.com>,   
   eaglesondouglas@gmail.com says...   
   >   
   > Back in freshman physics the large lecture   
   > hall was filled to direct students to the correct   
   > curriculum.  One class was the old mass thrust   
   > theory.  If you could not follow the theory you   
   > were directed to a non-physics department.   
   >   
   > I still wonder to this day.  I believed it was more   
   > complicated than stated.  There was a function   
   > of rocket mass change with time.  And a constant   
   > fuel mass burning giving thrust. A fuel mass velocity   
   > equates the theory.  Assuming a constant throttle.   
   >   
   > My question was the true efficiency of fuel mass   
   > to thrust.  The internal chamber structure is my   
   > question. How would a flat plate engine design   
   > differ from a the chamber? Begging the question,   
   > how do chamber designs converge to the most   
   > efficient?   
   >   
   > I figure that maybe the hottest engine is the most   
   > efficient.  Making the idea that a thermal defect   
   > exists.  This is energy radiated not effecting   
   > thrust.  This is of course small compared   
   > to chemical thrust.  But it does introduce the   
   > concept of chamber internal dynamics.   
   > How would a straight tube chamber differ   
   > from the normal cylinder with nozzle?   
   > And the exact location of the burn in the chamber   
   > be calculated?   
      
   A rocket engine's nozzle is absolutely essential for changing pressure   
   of the  combustion products into thrust.   
      
   Theory and equations here:   
      
   ROCKET PROPULSION   
   https://tinyurl.com/w9dyedn   
      
   Jeff   
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