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Text File  |  1992-09-02  |  316b  |  10 lines
  1. The sound barrier is a concept that the speed 
  2. of sound, or sonic speed about 1,220kph 
  3. (760mph) at sea level, constitutes a speed 
  4. limit to flight through the atmosphere, since 
  5. a badly designed aircraft suffers severe 
  6. buffeting at near sonic speed owing to the 
  7. formation of shock waves. 
  8.  
  9. Subject by: Vince Pike
  10.