Boeing 727A Boeing 727 jetliner is shown in this 1974 NASA Flight Research Center photograph taking part in a wake vortex study. Smoke from "smoke generators" installed on the tips of the aircraft's wings is shown being entrained by the wing tip vortices.Read More Facebook Pinterest X LinkedIn Email https://www.nasa.gov/image-detail/boeing-727/Copy URL to clipboard> DownloadShareSize1041x826px