But Chuck Norris never cries.

If they were real, Chuck Norris would have died in a tradgic one car rollover on a desolate highway by now.

That and the whole idea of a giant government conspiracy is just plain stupid.

and he replies it's due to chem trails and the government trying to help the environment...it backfired. He's not the brightest bulb in the fixture, but he does fairly good woodwork.

I haven't explored his voting choice, but I get the hint he is a Trump supporter only because they are similar in bully speech and beliefs...the type who starts out the sentence with, "Well, I told him..." Hopefully, he will be done before the election so I don't get myself in trouble with what I say.

When Prince died I saw a interview he did with Tavis Smiley in which he started Ed that Dick Gregory informed him of this. It's a wild conspiracy theory held by people of all kinds. I never understood it but there are many out there.

You see them behind high-flying aircraft. We see them behind modern jets; but, they were seen behind B-17 formations in WWII.

I have seen WWII pics of early jet-engine powered planes. They did leave contrails, but the design of the jet engine had changed since then.

The essential design of jet engines (i.e., the high-bypass turbofan engine) essentially uses jet fuel to move huge fans in the engine housing. This is not a rocket engine spewing burnt fuel behind it. This design has NOT changed in decades.

If so-called contrails are just water vapor, why do they stay in the sky ALL day? Why do some of them suddenly stop and start again, forming broken lines (like dashes) in the sky?

To my eyes, this form of air pollution started over my skies about five years ago. Prior to that, I NEVER saw the trails in any form. Now, I frequently see these straight-line streaks in the sky. Over a few hours, a single streak spreads out and and creates a hazy cloud. I see this with MY eyes. According to my binoculars, the airplanes producing this are not passenger planes.

I am an amateur astronomer. I've spent a lot of time in my 52 years staring at the sky. I moved to Western North Carolina about eight years ago. One of the reasons was the frequent occurrence planetarium-level sky displays -- deep dark skies with thousands of faint stars.

About five years ago, the skies started to change. No more faint stars, but I can see the trails in the night sky blocking that which is behind them.

I'm a big science kind of guy, but we must remember that big science used to tell us the cig smoking was harmless, when they knew otherwise. It's sad but true that scientists have to worry about who will fund them, which is why there are few Galileos willing to stand up to authority.

I don't know why they do this spraying, but it is obvious that it's occurring.

Anyway, watch this video so you can protect yourself

I asked a simple question -- why do the trails hang in the sky all day?

Thanks for your vacuous answer.

Your attempt at condescension fails.

Ya know, the way it used to be -- before these trails started appearing in the sky.

... when I was about 8 years old and first noticed one that lasted a long time. Over the following years, I noticed that that was not usually the case -- most of the time there were none at all, and sometimes only short ones that quickly dispersed. By the time I was in high school, it occurred to me that maybe there was a reason, so I did some research and found that, yes, there is a very simple explanation: the long-lasting ones only occur when the temperature and humidity are "just right."

Furthermore, those conditions are known well enough to allow fairly accurate predictions of when and where they will occur. Earlier this year, I was trying to make some time-lapse videos of long-lasting contrails, so I was tracking the predictions on this NOAA page to know when to set up a camera. For some reason, that page stopped updating predictions in March, but over the several weeks that I was watching it, I found that it was about 80% accurate when it predicted there should be some, and I never saw anything but short ones when the prediction said not to expect any.

I don't know why you think a turbofan engine shouldn't produce them. For passenger jets that don't need to go supersonic, turbofans are more efficient, but they still have to burn a LOT of fuel to push a 150-ton plane at 500 mph, and there is most certainly a lot of water vapor in the exhaust. If it condenses and freezes, you get a contrail that lasts until it melts or sublimates.

No offense, but I've noticed that a lot of amateur astronomers don't pay much attention to the daytime sky.

It's mostly solid ice in microscopic crystals. Lots of surface area, low overall density. Hence, they hang around all day.

Simple physics.

Because contrails are essentially clouds.

- Contrails don't have to dissipate immediately. They can last several hours. They can get holes in them because of differences in the atmosphere: especially humidity. Contrails can also expand or shrink depending on the conditions where they were created.

- Also, remember that plane altitude effects its contrail.

- Modern engines still create contrails. They still create the exhaust needed to form ice crystals, which basically form a cirrus cloud.

- How do you know that you planes you see are not passenger planes?

Finally, why does no one point of moronically wasteful spraying chemicals in the air would be if you were trying to spread them throughout a population? One would think using the water system would be a more efficient option. If the intent is to control the weather like other CTers claim, then why not just shoot rockets into the sky at a steady pace? The whole chemtrail thing is totally nonsensical.

I have always watched the skies closely. You must be referring to the "new" contrails that I NEVER saw before a few years ago -- the ones that actually hang in the sky. Water vapor trails should dissipate immediately, as they have historically done. Vapor is too light and the atmosphere too turbulent for it to stay around -- and for hours?

The modern engine produces little exhaust. It's a turbofan.

To my binoculars, the planes are small, dark, and unmarked. They do not look like, say 747s, and other planes that I have been on.

The start-stop patterns to which I refer are not gradual. Seems to be a very sudden on-off.

Have you ever watched an airplane leave a trail? Try it sometime with binoculars. It doesn't look like a passive trail of water vapor. The trails are thick, opaque, very white, and instantly fan out far wider than the actual airplane.

There are numerous zoom-in videos on YouTube of airplane spraying. I think most of what I have seen are from the crazy and the fearful, and I cannot vouch for the authenticity of the videos, but I doubt most vids are fake.

I don't know why they spray, but, I see it happening. I am still working on the "what is it?" I cannot fathom the why of it. I loath to be in the same company as Alex Jones and Chuck Norris.

Both points.

Water vapor / ice crystals don't always dissipate immediately. Otherwise, clouds wouldn't exist. Contrails are basically artificially made cirrus clouds that are bound to the same laws of physics as natural clouds. Contrails have actually been around since plane engines could produce them, and they didn't dissipate immediately.

This photo is from 1986 - https://www.flickr.com/photos/phil_p/4317237037

I don't know what a turbofan engine is, but modern engines still produce the exhaust needed for contrails. It depends on the engine, and many variables, though.

The small, unmarked planes could very well be jets or private planes.

Segmented contrails, as I said above, have a natural cause.

Contrails to me just look like the same contrails as ever. Keep in mind that the ice crystals are floating (like a cloud - maybe "puffing" would be the correct term), so the contrail isn't going to be a skinny straight line. Also, what you're seeing is very high in the sky. Even if it were a different consistency than normal clouds, it would be very hard to tell.

they leave contrails at the right altitude. They do now, and have always done so. I've been ON a plane that left contrails. There were no chemical tanks on it, other than fuel tanks. I promise.

I believe what you are saying.

Been watching the sky all my life. I have seen great changes in the past few years.

There's no more deep blue day skies by day and no more faint stars at night. It correlates with a newfound appearance of these so-called persistant contrails.

The skies do not resemble photos I took just a few years ago.

Thanks.

It's a function of relative humidity and wind consitions.

Low relative humidity means the contrails rapidly disapate. High humidity means they stick around.

And they've stuck around for a lomg time.

Look at this article from 1958:



Modern high-bypass turbofan engines are actually more likely to create dense contrails than older turbojets. The by-pass air rapidly cools the exhaust, allowing the water vapor to condense and crystallize before it mixes with ambient air.

You didn't address any of my points.

Why did you post? So you could feel better about yourself?

Does it work?

I have stated what I see and remember.

Not that contrails are chemtrails, but that chemtrail adherents are consuming some chemicals themselves.

Not that I'm a big believer in conspiracy theories, but I like reading about them and researching their merits...I believe anything is possible, and that each theory starts from a nugget of truth in the mix...

US Navy lookouts are well trained throughout the fleet...on ships, planes, range, speed, direction, etc, etc...and yes, even the length of contrails. According to the training I received, a contrail should extend roughly a finger length behind the contact from your point of view, based on an estimated altitude of 20k to 30k feet. A normal trail will dissipate after that(the finger-length).

I gives me cause to question why, but I'm not going to be losing any sleep over it. I'm still waiting for someone to spike the water with LSD.....the theories about WTC#7 are much more entertaining...

The persistence of the contrails is dependent upon the atmospeheric conditions. That's just basic physcis.

...with you...I'm as far from an expert on atmospheric science as one can be. I just believe in probability, as in "can it happen?-probably"

Tin foil is for wrapping frozen meat...lol. Again, I just like reading them and reading up on them.

The Bigfoot/Yeti/Florida ape stories are fun reading as well....

I like reading about nutty theories too. Always have!

Along with everyone else?