grc-1944-c-05494A Boeing B–29 Superfortress parks at the NACA’s laboratory in Cleveland, Ohio. The aircraft was used in July 1944 to flight test a series of modifications developed by researchers to reduce engine heating. Facebook Pinterest X LinkedIn Email https://www.nasa.gov/image-detail/grc-1944-c-05494/Copy URL to clipboard> DownloadShareTagsWebMod GrandfatheredSize2577x777px