Quote:
Originally Posted by tis
Again, I agree with you Sam. They are very different than the normal trails. They get much bigger and are in irregular patterns. They go up and down and crisscross each other. I think they are indeed something, I am just not sure what. I have been watching them for years. And they very often do appear on a very clear, sunny day.
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Are you serious? Do you actually believe this BS?
There are no government planes flying that spray chemicals into the air for any reason. The planes you see on such "irregular patterns" are mostly commercial airliners either coming from Europe over the Atlantic. What would you consider "regular patterns"? Do you know what the “regular patterns” are? Then how can you say what “irregular patterns” look like?
Contrails are of condensed water vapor made by the exhaust of aircraft engines. As the hot exhaust gases cool in the surrounding air they may precipitate a cloud of microscopic water droplets. If the air is cold enough, this trail will comprise tiny ice crystals.
The reason they get bigger is the wingtips of the plane create wingtip vortices, also know as wake turbulence which creates two columns of spinning air behind the airplane. This is what causes the contrails to spread out and dissipate. (The winds aloft help too)
When people see rainbows in the contrails they assume they are chemicals and that the government is to blame. Get a clue
Quote:
Originally Posted by Lakesrider
You will also notice these contrails more at this time of year because the air is clearer and dryer.
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Actually, you'll see more contrails when there is more upper atmosphere mositure. When the moist air is heated in the engine, then cools as it exits, the moisture is what freezes into ice crystals and becomes the contrail