Airline Vortex Image

Here's a very nice image from Steve Morris' airliners.net site showing the extent of the wingtip vortex generated by a wide-body jetliner (a Boeing 767 in this case).

Next time I am frustrated at taxi and runway delays, I'll try and remember this photo. Even though you can't ordinarily SEE the churning air behind a jumbo jet, it's still a good idea to wait a bit between take-offs.