AEDC transonic wind tunnel undergoes calibration

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Air Force photograph by Rick Goodfriend

A centerline pipe, pictured here, is used to measure pressure and determine test conditions in the 16-foot transonic wind tunnel at the Arnold Engineering Development Center, Arnold Air Force Base, Tenn. According to Michael Mills, wind tunnel performance engineer, this process is known as calibrating the tunnel and takes place every few years to ensure that correct conditions are being simulated in 16T.