Graphic from NTSB report into the crash of L-1011 N-310EA
National Transportation Safety Board
<a rel="nofollow" class="external free" href="http://libraryonline.erau.edu/online-full-text/ntsb/aircraft-accident-reports/AAR73-14.pdf">http://libraryonline.erau.edu/online-full-text/ntsb/aircraft-accident-reports/AAR73-14.pdf</a>