I have some basic questions regarding the Trent XWB:

  1. What's the air mass flow rate (or its range) of the Trent XWB engine?
  2. Is all of the air mass flow of the engine produced only by the 118" diameter fan? Or do combustion and turbine/compressor produce some of this air mass flow?
  3. What's the fan stage pressure ratio or range of it?

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