Instrumentation on a 15,000-pound thrust Pratt & Whitney RL-10 engine installed in PSL No. 1.
Instrumentation on a 15,000-pound thrust Pratt & Whitney RL-10 engine installed in Propulsion Systems Laboratory (PSL) No. 1. (6/6/1961)
Image Credit: NASA
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https://www.nasa.gov/image-detail/grc-1961-c-56854/
Image CreditNASA
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