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Old 12th Feb 2013, 14:27
  #45 (permalink)  
barit1
 
Join Date: Feb 2005
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Yes, alternate hub-driving & case-driving LP turbines on the GE UDF demonstrator engines of the 1980's. These were directly coupled to contra-rotating open fan blades.

No reason in theory why it shouldn't work in the compressor, although the cure seems worse than the disease.
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