474669main-boeing-sunrise-1083×812
Chevron nozzles—the saw-toothed edges on the back of this jet engine—followed the TRL roadmap and are now seen on engines today.
Image Credit: NASA / The Boeing Company
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https://www.nasa.gov/image-detail/474669main-boeing-sunrise-1083x812/
TakenAugust 17, 2017
Image CreditNASA / The Boeing Company
Size1083x812px