Are these chemtrials or contrails?, page 1

Well, I have to give you credit for at least trying to answer the questions.

HRQ: Do you agree that contrails are composed of the same thing as clouds (i.e. ice crystals)?

Sauron A: I don’t know the chemical composition of contrail i.e. burnt fuel and what ever other toxins, But for this discussion I will say sure they’re the same more or less.

HR: True enough there are traces of unburned or partially burned fuel as well as normal combustion by products which are mainly H2O, CO2, and traces of NOx and SOx, from fuel additives and of course soot particles. It should be noted that todays jet engines are much more efficient then those of 20 years ago.

HR Q: If the atmospheric conditions are right for clouds to exist, then why can't contrails persist and even grow into overcast conditions, just like clouds?

Sauron A: how can they? they are only there because of the heat from the jet exhuast they don't spead and cover the sky.

HR: Hold on there. I don't think that you understand the process by which contrails form. "Heat from the exhaust?" no, contrails are formed as the normal jet engine exhaust cools down to the ambient temperature at high altitude. At 30,000 feet, the average temperature is around -48 degrees below zero. Furthermore there are thermodynamic processes in play when the hot exhaust gas exits the engine. The drop in pressure as this happens also causes a significant cooling of the gas.

Sauron A: If a jet is flying through air at altitude with a low humidity, the moist air from the jet engine might produce a slight, short-lived contrail,

HR: True, but you must remember that at the altitude that these planes fly, it only takes a very small amount of water to affect the relative humidity with respect to ice.

Sauron A: an contrails have been around for years. sailors have known to look specifically at the patterns and persistence of jet contrails for weather forecasting,
A thick, long-lasting contrail indicates humid air high in the atmosphere, and can be an early sign of a storm, but again they don't spread into clouds they disapate.

HR: Why do they have to dissipate? If a storm front is moving through, then the conditions are ripe for overcast anyway. I suggest you research the phenomena known as supersaturation google the terms supersaturation and atmosphere.

One more question: What is the best scientific evidence that chemtrails exist?