posted 02-11-2003 05:59 PM            

As with thunderstorms, contrails have a VERY, VERY SHORT LIFE! Why? Because the two requirements are hot air and cold air. Hot air moves faster than cold air. Thus the collisions.

As the hot air moves quickly away, the cold air is left alone, harmless and slow moving. Contrails, when the hot air or jet engine moves forward, dissipate QUICKLY, simply because there is no source of hot air creqated to collide with the cold upper atmospheric air.

After the heat source leaves, the residule contrail or ice residue will melt very quickly due to the extreme exposure to the sun's rays which cause it to expand and thus fall apart.

This is seen everyday on a clear day when a high flying jet leaves behind a contrail. You can notice that the contrail is RARELY more than two or three inches behind the jet as measured from earth, which would probably make the contrail about two or three hundred feet long, MAXIMUM! WHY?

BECAUSE AS THE HEAT SOURCE LEAVES,(THE JET ENGINE)THERE IS NOTHING TO COLLIDE AGAINST THE COLD AIR AND THUS CREATE THE CLOUD-LIKE CONTRAIL.

REMEMBER CLASS, NO HEAT SOURCE, NO CONTRAIL, NO WAY!

CHEMTRAILS have different physical aspects. CHEMTRAILS EXIST ON DIFFERNT SCIENTIIFIC PRINCIPLES!

CHEMTRAILS are created by INDUCING AN ATOMIZED FORM OF LIQUID INTO THE ATMOSPHERE! THUS, WHEN THE CHEMICLE IS INTRODUCED THE AIR, THERE IS NO COLLISION BETWEEN HOT AND COLD, BUT THERE IS EFFECT OF HANGING IN THE ATMOSPHERE BY A VERY LIGHT WEIGHT LIQUID WHICH EVENTUALLY FALLS TO THE GROUND! THAT IS ITS PURPOSE!

AS THE CONDENSED CHEMICLE HANGS IN THE AIR IT CLINGS TOGETHER AND IS ACTUALLY FALLING CHEMICLES NOT CRYSTALIZED ICE PARTICLE WHICH NEVER BECOMES HEAVIER AND FALL TO EARTH!

IT IS THIS FALLING THAT CREATES THE "LACY' curtain effect!

PLEASE, BEFORE YOU LECTURE ME ABOUT A SUBJECT I TEACH, LEARN THE BASIC PRINCIPLES OF SCIENCE, AND THE DIFFERENCE BETWEEN FALLING PARTICULATES AND DISSIPATING ICE CRYSTALS!

THAT'S ALL!

FINAL EXAM IN TWO WEEKS!

posted 02-11-2003 06:25 PM            

Have you ever seen a cloud? Apperantly not.

As shown by normal clouds that float around all day, you only need the heat source to bring the cloud into existince. Once the cloud starts to form, it no longer needs outside forces to keep it visible and growing. They build themselves using their own internal workings and slowly float away from the source, maintaining structure and usually growing larger.

I live in Phoenix. In monsoon season, you can see the GIGANTIC CB clouds building all through the afternoon. Then they slowly move in toward Phoenix building and building until they dump their contents onto my house so I have to rebuild my fence every night.

You can see this every day.

posted 02-11-2003 09:22 PM            

quote:

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This is exactly what I am thinking and truly observing, not intended to be insulting, arrogant or condescending in any way.

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posted 02-11-2003 10:54 PM            

The water vapor from an aircraft engine may also be joined by moisture already in the air. This makes the contrail larger.

and

Ice particles formed by the condensation of the water vapor from the engine exhaust will be joined by water in the atmosphere. This will create a contrail that extends a long distance behind the airplane. It can remain visible long after the airplane has gone. These contrails can last for hours and can even grow. They can spread for several miles.

posted 02-12-2003 01:05 AM            

Clouds are water droplets or particles of a very small size. They can be either liquid or ice, depending on several factors. You can actually have liquid droplets at well below freezing temps, which is how aircraft get structural icing, because those liquid drops freeze to the aircraft.

Cirrus is the thin stuff you see that is really high, and is composed ice crystals. Obviously the sun can not just instantly melt ice crystals at that altitude, due to the existence of cirrus clouds, and that you have ice on mountains that approach 30,000 elevation. These are so thin and you can often see thru them, and are what cause sun dogs, moon dogs, and halos.

Water vapor is like the air outside, you have water in a gaseous form. Add more water or cool the air, and that can change into liquid.

Dont let anyone tell you clouds are water vapor.

posted 02-12-2003 01:50 AM            

quote:

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BUT THERE IS EFFECT OF HANGING IN THE ATMOSPHERE BY A VERY LIGHT WEIGHT LIQUID WHICH EVENTUALLY FALLS TO THE GROUND! THAT IS ITS PURPOSE!

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AHA! Everything I knew was wrong!!! Liquid has to be very light to fall to the ground! This makes so much sense! And I always thought it had to be heavier than air.

posted 02-12-2003 03:36 PM            

quote:

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Originally posted by Feelin Kocky:
You would have a good point, professor, if the mist of you breath was similar in any way to contrail formation.

F.K.

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posted 02-12-2003 07:20 PM            

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Originally posted by CaptWalker:
It is actually similar, just on a MUCH smaller scale. Same principles at work.

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OK, at the very basics of saturating, yes they are similar. I should have worded my previous response better.

professor said: >>I'm glad in those cold weather states that when people breathe their breath steam isn't miles long, lol.<<

I have seen on many many many numerous occasions steam plumes from the cooling towers at some of the plants near my town that stretch to the horizon. Ie. several miles long. So I guess that proves that what we see at high altitudes must be water also? Since we are attempting to compare the two.

posted 02-12-2003 08:30 PM            

quote:

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Originally posted by the professor:
http://pub31.ezboard.com/fcontrailsandchemtrails22884frm1.showPrevMessage?topicID=8 51.topic

quote weather above 100 xtimes different 100 ? I'm glad in those cold weather states
that when people breathe their breath steam
isn't miles long, lol.

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Have you not seen the pictures of arctic explorers and those who climb high mountains, who have beards and mustaches covered in ice from their breath?