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Arnold Air Force Base: Tunnel 9 Heater System Expert Passing Along Knowledge
June 17, 2019
ARNOLD AIR FORCE BASE, Tennessee, June 17 -- The U.S. Air Force issued the following news:

By Bradley Hicks

Mike Metzger holds a unique position in the world.

A system engineer at AEDC Hypervelocity Wind Tunnel 9 in White Oak, Maryland, he is among a handful of people familiar with the Tunnel 9 heater system and the only system engineer ever assigned to it. The system is used to store and heat the nitrogen gas needed for testing operations at the facility.< . . .

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