https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/441515Edit ImageSaveSaveEditCropCustom TextWater Type Muffler Test of aircraft at NASA Langley Research Center. May 13th, 1957. Original from NASA. Digitally enhanced by rawpixel.MorePublic DomainFree CCO U.S. Government image for Personal and Business useInfoView CC0 LicenseEditorial use only JPEGTIFFSmall JPEG 1200 x 960 px | 300 dpiLarge JPEG 3500 x 2800 px | 300 dpiBest Quality JPEG 4000 x 3200 px | 300 dpiTIFF 4000 x 3200 px | 300 dpi | 73.27 MBFree DownloadWater Type Muffler Test of aircraft at NASA Langley Research Center. May 13th, 1957. Original from NASA. Digitally enhanced by rawpixel.More