MEMBER & GUEST INTERACTION SECTION > DARK SIDE OF THE MOON

Airplaine vapor

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Richard M:

--- Quote from: GSF on December 10, 2015, 11:00:41 am ---

..................Lets talk about condensation trails. They are made up when warm or hot air is exposed to cooler air. If you watch the skies long enough you'll see that the trail behind a lot of planes will only be so long and disappear as the plane travels. That's what condensation does, if it didn't the air we exhale in the winter would hang around for a lot longer.

........................... What's your take?

--- End quote ---

That's because what you are seeing at 36,000ft+ isn't condensed liquid water because condensed liquid water won't remain as such for long at around -70 degrees F / -60C .

What you're seeing is ice crystals; they will eventually evaporate (sublime), it's a very slow process.

Contrails are nothing new; you see all those 8th Air Force photos from WW2 of whole Bomb Groups in the air with huge contrails behind them.

jayj200:
yep thats why I saw this one day this year

6 different con-trails crossing all at the same point

GSF:
good replies

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