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Old 3rd April 2009 | 02:51
  #27 (permalink)  
Wjh308
 
Joined: Mar 2009
Posts: 3
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From: Florida
I think it is the engine spooling up briefly. The RB211's having 3 stages tend to make that growl. Watch video's of L1011's taking off, and tell me if that growl is the same sound you are hearing.
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