XPost: alt.fan.rush-limbaugh, sci.physics.relativity, sci.math   
   From: chine.bleu@yahoo.com   
      
   J Carlson wrote:   
   > I vaguely remembered something about that. I did a Google search on   
   > "were jet engines for me 262 unreliable" and the Google AI Overview   
   > answer reads:   
      
   The problem is regions of jet engines are very hot and high pressures.   
   The alloys in 1940s could not deal with.   
      
   >   
   >     Yes, the Junkers Jumo 004 engines powering the Me 262 were a   
   > significant   
   >     source of unreliability during World War II. These early jet engines   
   > had a   
   >     limited lifespan, typically requiring major overhauls after just   
   > 10-25 hours   
   >     of operation. This unreliability, combined with shortages of strategic   
   >     materials and fuel, hampered the Me 262's operational effectiveness.   
      
   German jet engines are what called axial flow where turbine and   
   compressor blades were stressed beyond their limits.   
      
   >> British jet engines lasted much longer, German industry could not   
   >> build replacement engines fast enough to keep jets in operation.   
   >   
   > Sounds about right.   
      
   Britain used centrifugal flow which did not stress the metal as much.   
      
   > Interesting that even as late as the 1940s, British inventors were still   
   > ahead of the U.S.   
      
   In the late 1940s and 1950s stronger alloys were discoverred that made   
   strong blades. Everyone went axial flow since the engines could run a   
   long time. The stronger alloys were not known earlier and some of the   
   metals were widely available to UK or Germany. UK engines worked with   
   that while German engines tr   
      
      
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