https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/441382Edit ImageSaveSaveEditCropCustom TextDC-9 V/STOL Transport Model in the 40x80 Foot Wind Tunnel, Apr 28th, 1971. Original from NASA. Digitally enhanced by rawpixel.MorePublic DomainFree CCO U.S. Government image for Personal and Business useInfoView CC0 LicenseJPEGTIFFSmall JPEG 1200 x 779 px | 300 dpiLarge JPEG 3500 x 2273 px | 300 dpiBest Quality JPEG 5673 x 3685 px | 300 dpiTIFF 5673 x 3685 px | 300 dpi | 119.65 MBFree DownloadDC-9 V/STOL Transport Model in the 40x80 Foot Wind Tunnel, Apr 28th, 1971. Original from NASA. Digitally enhanced by rawpixel.More