https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/441426Edit ImageSaveSaveEditCropCustom TextTesting Tilt Wing Propeller Model in Ames 40x80 Foot Wind Tunnel, Oct 1st,1959. Original from NASA. Digitally enhanced by rawpixel.MorePublic DomainFree CCO U.S. Government image for Personal and Business useInfoView CC0 LicenseJPEGTIFFSmall JPEG 1200 x 934 px | 300 dpiLarge JPEG 3500 x 2724 px | 300 dpiBest Quality JPEG 4080 x 3175 px | 300 dpiTIFF 4080 x 3175 px | 300 dpi | 74.15 MBFree DownloadTesting Tilt Wing Propeller Model in Ames 40x80 Foot Wind Tunnel, Oct 1st,1959. Original from NASA. Digitally enhanced by rawpixel.More