Explain This Picture Please
 

Hello Guys,

can someone please explain to me this picture?

what is the fog type stuff coming from the airplane? How is it produce?

thanks for all inputs.

Here's the technical answer... Airplanes create lift through a pressure differential above and below the wing (Lower pressure on the upper surface of the wing)

In very humid conditions and when the temperature is just right, the sudden drop of pressure on the top of the wing also results in a temperature loss. That sudden drop in temperature results in condensation forming (as the temp of the air is dropped to the dew point).

That's what forms the fog. Difficult to explain to a lay person (somebody that doesn't have any weather or aerodynamics theory), but hopefully that gives a bit of basic info.

That shot reminds me of listening to the air disturbances as the wingtip vortices go by. Fascinating!

Yep, sometimes they sneak up on you - had this happen playing Doral a few years back, and sometimes you can sit and watch as the trees shake/listen for long periods of time - like in the rice paddies behind the Narita Hilton.

Or for those pilots that fly in and out of Juneau, the trees in the middle of "the cut".:)

Flying into LGA behind a Delta 767 one day a few years back, I watched the wake turbulence stir up the water in the harbor... right up to a little 16' sailboat that got flipped over! I bet that poor sailor was surprised when he got dumped into the water.