Public domain
GRC-1996-C-03639
From the collection of NASA Image and Video Library. Free to download, adapt and use — no permission needed.
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ALLISON DUCTED FAN IN 9X15 FOOT LOW SPEED WIND TUNNEL
NASA Image and Video Library’s own descriptionCredit lineGRC-1996-C-03639. NASA/GRC, 2009-09-18. Public domain. ID: GRC-1996-C-03639.