5.2% 777 semi-span model in the National Transonic Facility at Langley5.2% 777 semi-span model in the National Transonic Facility at Langley.Read More Facebook Pinterest X LinkedIn Email https://www.nasa.gov/image-detail/5-2-777-semi-span-model-national-transonic-facility-langley/Copy URL to clipboard> DownloadShareSize1041x832px