vortices

An interesting article in the BBC News Magazine today: http://www.bbc.co.uk/news/magazine-31109732 British air traffic controllers have invented a new system that could eventually cut flight delays all over the world. The principle is simple enough. Planes coming into land will be spaced out...

Hope this is OK to post here - it's quite a new video and one I hadn't seen before - a really good compilation of low-altitude vortices and aerodynamic contrails on take-off and landing. Look at 5:12 for a nice propeller contrail from a Flybe Dash 8 :)