https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/441384Edit ImageSaveSaveEditCropCustom TextFour Engine USB Model in the 40x80 foot Wind Tunnel. Large-Scale Upper-Surface Blowing Model using JT15D Engines. Test #441, June 18th, 1974. Original from NASA. Digitally enhanced by rawpixel.MorePublic DomainFree CCO U.S. Government image for Personal and Business useInfoView CC0 LicenseJPEGTIFFSmall JPEG 980 x 1200 px | 300 dpiLarge JPEG 2859 x 3500 px | 300 dpiBest Quality JPEG 4771 x 5841 px | 300 dpiTIFF 4771 x 5841 px | 300 dpi | 159.49 MBFree DownloadFour Engine USB Model in the 40x80 foot Wind Tunnel. Large-Scale Upper-Surface Blowing Model using JT15D Engines. Test #441, June 18th, 1974. Original from NASA. Digitally enhanced by rawpixel.More