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Every Condition is Wrong for Contrail Formation
The formation of condensation trails requires high vacuum,
cold temperatures, and high humidity, however, the output side of a jet engine contains mostly outside air that has been pushed through the engine by the large ducted fan (The ducted fan is the set of spinning blades that you see when you look at the front of the engine). This high-pressure at the output of the engine is contrary for the formation of condensation trails because pressurized air has the ability to hold much more water in suspension, without condensation.
A fraction of the air that enters the engine is taken in by the turbine engine. This air is mixed with jet fuel (essentially kerosene), combusted, and then exits the engine under very high pressure and high temperature. Condensation formation requires a decrease in ambient air pressure to form, but the output of the turbine is under very high pressure which prohibits the formation of condensation trails.
Physics also tells us that condensation forms when air is cooled, but since the exhaust of the turbine engine within a jet is very hot, condensation formation is - once again - prohibited.
Furthermore, the ratio of air-to-fuel used in turbofan engines is as high as possible (lots of air but relatively little fuel) so as to keep engines efficient and cost-effective, and this lack of fuel in this ratio results in a lack of water vapor; yet another reason jet turbofans cannot produce condensation trails.
In short, the more efficient the engine, the less fuel it uses per unit of air moved, and this renders turbofans incapable of producing condensation trails, unless they use water injection (see section below).
Simply said, every condition necessary for contrail formation is absent in a high-bypass turbofan engine.
If you go to an airport and watch jets take off, you will see that they emit a faint trail of black soot, which is typical of burnt jet fuel (kerosene), but you will not see water vapor.
Aloysius the Gaul
Using less fuel does not render them "incapable" even by his own reasoning - it should render them less LIKELY by simplistic reasoning - however other considerations actually make it MORE likely- put simply the higher the efficiency of the engine, the higher the temperature at which contrails can form, and so the more likely they are to do so - the math is in the link if you want to examine it closely.
Nobody jumping in to defend Russ then? Doesn't look very good for him, can anything from him be consigned to the hoax bin in future then?
"How many times can a chemtrail believer be wrong??"
The answer, my friend, is blowing in the wind, the answer is blowing in the wind .....
(Sorry, couldn't resist )
reply to post by tsurfer2000h
I am surprised none of the chemtrail proponents have dismissed it as " disinfo " so they can happily sit in la- la land a little longer