20K COMBUSTION OSCILLATION STUDIES AT THE ROCKET ENGINE TEST FACILITY RETF SOUTH 40
20,000-pound thrust engine in Test Stand A (10/13/1960).
Image Credit: NASA/ARDEN WILFONG
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https://www.nasa.gov/image-detail/grc-1960-c-54596/
Image CreditNASA/ARDEN WILFONG
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