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Originally Posted by Otto
NASA has been studying serrated trailing edges, and serrated leading edges are of interest, too. Google for it. Also, check into Barred Owls, which have serrated feathers for ultra-quiet flight. Works.
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NASA's Paul Soderman sent me a paper he did from his research at NASA Ames.He had studied owl flight and I believe the premise of the work was acoustic Stealth,and not necessarily drag reduction.---------------------- At full take-off power,does the sawtooth blend the interface between the turbo-fan's jet stream and the slower surrounding nacelle air?