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AN-12 crash in Domodedovo.

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AN-12 crash in Domodedovo.

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Old 28th Aug 2007, 09:10
  #21 (permalink)  
 
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Is bird ingestion that common with turboprops? I would have thought that a bird would have to be rather determined to make it through the propeller disc and then into a narrow annular intake, as opposed to the large intake area presented by a turbofan or -jet.

Are turboprops tested for birdstrikes in the same way as fans?
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Old 28th Aug 2007, 17:12
  #22 (permalink)  

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Bird injestion in turbo props is not uncommon, one tragic incident comes to mind, Such as a C-130 in the Netherlands in 1996 which resulted in the tragic loss of 34 lives.
Although the prop blades make good meat choppers, you have a much smaller turbine to deal with the remains once they have made it through to the intake.
Piston engine aircraft have also suffered from engine damage for example, Carb intakes & oil coolers damaged / blocked, along with damaged cowlings.
As far as I'm aware turbo prop engines are tested as part of the certification process, but not sure to what number or weight of birds.
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Old 28th Aug 2007, 22:38
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Are turboprops tested for birdstrikes in the same way as fans?
Yes Bird size and quantity is set roughly as a percentage of the intake area (actually it is a stepped relationship to correspond with typical flocking bird sizes) see FAR/JAR 33.76
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