PPRuNe Forums - View Single Post - Drag of a seized jet engine compared to windmilling
Old 27th Oct 2019, 14:35
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lomapaseo
 
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tdracer
Dave, I also have an old memory that a seized fan was a critical case for EROPS/ETOPS range due to increased overall aircraft drag - I can't readily resolve that against some of the comments here.
Yup ! therein lies the crux of this discussion throughout this whole thread

you can lead a horse to water .....

Like many other fun threads on this net, we often end up voting our answers. That's why in the end I just rely on what the FCOM manual says since that at least has been carefully thought out

btw, I also recall the documentation provided to the FAA regarding seized rotor drag (due to icing between the blades and casing) in the event of a forced descent into icing conditions in an ETOPs event. So it seems that it wasn't enough of a problem to stand in the way of granting ETOPS
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