...en.wikipedia.org/wiki/Wingtip_vortices
http://en.wikipedia.org/wiki/File:Airplane_vortex_edit.jpg
Thanks Dave G & Ken for commenting about vortices on YFT's m...
Let us know if you're interested in purchasing Calendars for 2014. If we get several people commenting here that they are interested, we'll make some and pass them on t...