This page from the NASA Langley Research Center contains an image and description of a wake vortex created by the wing of a small propeller plane. The page explains how the image was made and how this research helps determine the spacing between airplanes approaching an airport.
NASA Langley Research Center. Wake Vortex Study at Wallops Island. Hampton: NASA Langley Research Center, March 10, 2003. http://lisar.larc.nasa.gov/UTILS/info.cgi?id=EL-1996-00130 (accessed 31 October 2014).
%0 Electronic Source %D March 10, 2003 %T Wake Vortex Study at Wallops Island %I NASA Langley Research Center %V 2014 %N 31 October 2014 %8 March 10, 2003 %9 image/jpeg %U http://lisar.larc.nasa.gov/UTILS/info.cgi?id=EL-1996-00130
Disclaimer: ComPADRE offers citation styles as a guide only. We cannot offer interpretations about citations as this is an automated procedure. Please refer to the style manuals in the Citation Source Information area for clarifications.