Boeing and NASA Collaborate on Noise Reduction with Chevrons on Engine Exhausts

In 2006, Boeing began using chevrons, or scalloped edges, on turbofans mainly for noise reduction. They added the chevrons to engines on the fan ducts on the 737 MAX, B787 Dreamliner, and 747-800. Airbus, Boeing’s main competitor, did not install chevrons and focused on other methods to make their engines quieter.  Boeing has since abandoned […]

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