Pratt and Whitney Canada’s 747SP testbed departs NASA Armstrong Flight Research CenterPratt and Whitney Canada’s 747SP testbed departs NASA Armstrong Flight Research CenterRead More Facebook Pinterest X LinkedIn Email https://www.nasa.gov/image-detail/pratt-whitney-canadas-747sp-testbed-departs-nasa-armstrong-flight-research-center/Copy URL to clipboard> DownloadShareSize1041x694px