Using a photo of a Pratt & Whitney F135 engine in the AEDC Sea Level 2 test cell, Alan Hale, an AEDC analyst, left, describes how full frequency range screech analysis methodology is being used to reduce instability during aeropropulsion testing in AEDC engine test facilities at Arnold Air Force Base. Looking on is Jonathan Lister, center, and Wesley Cothran, right, AEDC team members who were also instrumental in developing and demonstrating the screech analysis methodology, Dec. 8, 2018, in the main lobby of the jet propulsion testing facility.

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Photo credit: © AB Forces News Collection / Alamy / Afripics
License: Licensed
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Keywords: aedc, afb, afmc, aftc, air, arnold, center, command, complex, development, engineering, force, materiel, test