PPRuNe Forums - View Single Post - BOAC B707 ops in the 1960s
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Old 19th Jan 2015, 09:21
  #167 (permalink)  
mustafagander
 
Join Date: Jun 2001
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They are diffusers which, allegedly, reduce the noise.

As you say Haraka, I shudder to think about the noise levels of the bare engine!!
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