![African American man stands next to aircraft engine inlet model inside a wind tunnel test chamber. Another man with headphones, kneels beside the model with notebook in hand.](https://www.nasa.gov/wp-content/uploads/2022/10/grc-1979-c-01044-e1678733993171.jpg)
grc-1979-c-01044
Albert Johns (left) examines the setup of a Quiet Clean STOL Experimental Engine in the 9-by 15-Foot Low Speed Wind Tunnel in March 1979.
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Albert Johns (left) examines the setup of a Quiet Clean STOL Experimental Engine in the 9-by 15-Foot Low Speed Wind Tunnel in March 1979.