PPRuNe Forums - View Single Post - The Old N1 and EPR again!
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Old 3rd Aug 2005, 13:45
  #15 (permalink)  
Max Angle
 
Join Date: May 2001
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In theory I guess, but all engines are not equal, they get tired, dirty, worn, out of trim etc,
Which means of course the N1 is different as well. Quite common to see two unmatched engines producing the same EPR but having to use more N1, higher EGT and more fuel to do it. With degradtion of fan, turbine and compressor clearances etc. the engine has to go round faster to produce the same thrust.
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