Alternative Low Noise Fan System in 9×15 Foot Wind TunnelProgress toward quieter aircraft: Alternative Low Noise Fan System mounted in the 9'x15' Low Speed Wind Tunnel.Read More Facebook Pinterest X LinkedIn Email https://www.nasa.gov/image-detail/alternative-low-noise-fan-system-9x15-foot-wind-tunnel/Copy URL to clipboard> DownloadShareSize1041x808px