Group of fighter airplanes fly leaving a trail of black smoke and vortex. 70 shaped formation of a group of fifteen russian military fighter jet planes flying high in blue sky during Vicotry Day parade. More stock photos from Dezzor's portfolio. Group of four aircraft fighter jet airplane sun glow toned gradient clouds sky. Group of white fighter jet airplane with a trace of white smoke against a blue sky. Jets leave white trails, or contrails, in their wakes for the same reason you can sometimes see your breath. The hot, humid exhaust from jet engines mixes with the atmosphere, which at high altitude is of much lower vapor pressure and temperature than the exhaust gas. The water vapor contained in the jet exhaust condenses and may freeze, and this mixing process forms a cloud very similar to the one your hot breath makes on a cold day.  Plane trails subject to the altitude of aircraft Jet Planes Leave A White Trail Behind Them Because Theorem where it can traced the trail path of airplane. And it’s simple engine exhaust of airplane which constrains with mixture of air pressure as well the it contain quantity of water vapor combinations it form in the low ambient temperature that exists at high altitudes that allows the formations of trails. But jets leave them more often and more distinctly, because of the altitudes they are at and the enormous sudden pressure and temperature drop the air experiences as it leaves the engine. 0. 0.  The wingtip vortices which trail from the wingtips and wing flaps of aircraft are sometimes partly visible due to condensation in the cores of the vortices. Each vortex is a mass of spinning air and the air pressure at the centre of the vortex is very low. These wingtip vortices are not the same as contrails. Jets grojp navigate by a mixed use of GPS and ground based sources. This soot phenomenon is similar to that seen coming from large tractor trailer trucks. The real purpose of the barrels is to jet planes leave trail group the weight of passengers or Jet Planes Leave A White Trail Behind Them Because Ep cargo. Skip to content Contrails are the visible reminder that on a daily basis numerous commercial and private flights cross the skies across the world. Artyom says:. HaDi says:.

It is believed by some that contrails, or a trail of condensed water from an aircraft at high altitude, are chemtrails that contain chemicals made to harm humans. These chemicals are supposedly put in these jets by the government for various goals such as for profit solar radiation management, weather modification, mind control, human population control, and biological warfare, that is they are causing respiratory and other health problems.

This all began in the s when investigative journalists started to describe implied plots by the government to inject poisons into the atmosphere by the trails of jet planes. This belief is still believed by many today but the Air Force and many other scientific agencies have responded to these various information sites with information on why they are incorrect.

Information concerning this extraordinary belief is online and YouTube. This extraordinary belief is important to look at because many individuals believe that the government has a secret plan to harm their citizens.

Extraordinary claims require extraordinary proof. The evidence backing up the claim that there is a large secret program that the government is poisoning people from aircraft is very weak, as most are just photos of the sky and not hard evidence. They do not dissipate quickly, instead they open into formations that look like fake cirrus-type clouds that last for hours. Witnesses have photographed military and unmarked jets who leave these long-lasting trails.

The chemicals that are being released are said to be unknown, because only a few planes in the world can analyze them and they are expensive. Chemtrailers have said they have tested the soil that these chemtrails have fallen on and have found chemicals.

A panel of 77 atmospheric chemists and geochemists have responded to these claims to give their findings. The patterns found in these contrails are from multiple aircrafts flying in different directions of each other intersecting their trails. Contrails can last anywhere from a second to several hours as it depends on atmospheric conditions at the altitude the plane is flying.

There are no scientific findings of chemicals in these trails, and for the soil tests scientists say that whoever collected the samples they did not do so properly. People who believe in this conspiracy think that the government has their own agenda and should be to blame for many health issues in America. Ultimately these people are misinformed. The belief of chemical spraying would mean that thousands of people would be sworn to secrecy, like pilots, delivery men, aircraft maintainers, ect.

Believers in this theory come from all around the United States and all levels Jet Planes Leave A White Trail Behind Them Because Word of education. There is a chemtrial group on Facebook with about , members. Many of these people are outcasts, and having this social group of similar people backing up their beliefs they feel more accepted. These believers feel a sense of belonging in their group but also have a sense of being different as only a small population believes this. A reason people believe in chemtrails is they want to blame bad things happening to them, like sicknesses, on a higher power because they are controlling them.

As water vapor condensing in high-altitude, very cold air is simpler than the idea that the government is secretly spraying people with chemicals for their own personal benefit. Closed groups of like-minded people one of the big reasons why conspiracy theories solidify online. When closed off groups are supporting each other by sharing their ideas who believe the same things often further confirms what they believe.

These people also have a distrust to authority as the government are the people who are running chemtrails. I liked your post as well because you give other alternatives as to what people believe is the goal for these contrails. I think the part that grabbed my absolute attention the most was when you were explaining how geochemists etc. Second, how do you test soil for chemicals? These are just some of the questions I have regarding this experiment!

Overall, very nice post! Yeah I had the same thought about testing the soil for chemicals. The phenomenon is similar to that of seeing your breath on a cold winter morning, but at a far larger scale.

The atmospheric conditions required for the formation of contrails are cold temperatures and low to moderate humidity. This combination of conditions occurs regularly at the cruising Jet Planes Leave A White Trail Behind Them Because Days altitude of most turbofan and turbojet powered aircraft.

Airliners, business jets, and military aircraft all use turbofan and turbojet engines to cruise at these high altitudes where contrail formation is most likely to occur. Turbofans and turbojets directly expel their exhaust to the atmosphere, providing the mixture of carbon dioxide, water vapor and trace soot particles little time to cool.

In contrast, turboprop powered aircraft that use jet engines to drive a propeller typically fly at lower altitudes; in addition they extract power from the exhaust gases to drive the propeller, and those gases pass through exhaust stacks to the outside of the aircraft. This combination of power extraction, exhaust stacks, lower altitudes and warmer temperatures reduces the exhaust gas to outside air temperature gradient sufficiently to generally reduce the likelihood that contrails will form.

Modern piston engine powered aircraft are largely incapable of reaching the altitudes and thus temperatures where contrail formation is possible. Additionally, the exhaust manifolds used on these engines allow the exhaust gasses to cool substantially prior to interacting with the atmosphere. However, it is worth noting that the massive radial engines that powered the bombers of WWII and the early Cold War did in fact create contrails.

The incredible power output of these engines and allowed these aircraft to cruise at altitudes where the temperatures were sufficiently cold to produce contrails. Most importantly, extremely cold air mixing with hot exhaust gasses leads to the formation of contrails. Rapid cooling of the water vapor from combustion temperature to ambient temperature forces ice crystals to form, creating the clouds that are referred to as contrails.

The second critical atmospheric condition is low relative humidity. Without low humidity present, water vapor in the exhaust gasses does not form into ice crystals that linger long enough to create a noticeable contrail.

High pressure is the third ingredient to forming persistent contrails. High atmospheric pressure is generally associated with colder temperatures at high altitude, resulting in larger temperature gradients from the exhaust to the surrounding air, thus resulting in the rapid cooling of water vapor to form ice crystals.

Engine design factors may also contribute to contrail formation. The exhaust temperature of an engine is dependent of a range of factors, but generally speaking newer, more efficient jet engines burn less fuel at hotter temperatures. In order to achieve the same or greater thrust output, these newer engines pass larger amounts of air around the combustion section this is called bypass air, and the relationship between bypass air and burned air is expressed as bypass ratio , leading to better mixing of the bypass and combustion air, encouraging the formation of contrails.

Studies of bypass ratio on contrail formation suggest that larger bypass ratios less air burned, more air diverted around the combustion section results in more frequent contrail production. The persistence of contrails is largely dependent on atmospheric conditions. While too much humidity prevents the formation of contrails altogether, too little humidity results in contrails that sublimate from ice back to vapor quickly.

Temperature also affects this relationship, with research indicating that an optimum temperature for persistent contrails exists, decreasing with increasing altitude. Additionally the presence of particulate matter in the engine exhaust may allow contrails to persist for longer periods of time by providing condensation nuclei for ice crystals to form around.

These condensation nuclei allow the ice crystals to grow prior to sublimating back to vapor, yielding longer lasting contrails.

Older jet engines and turbojet engines tend to create exhaust plumes with more of these particulates present resulting in potentially longer lived contrails. Contrail formation has been studied and is regularly forecast, particularly by military organizations that seek to avoid visual detection of their aircraft. The Appleman Contrail Forecast chart has been in use since to predict contrail formation. This research conducted by the USAF resulted in new prediction tools for contrails.

The USAF research confirmed that decreasing temperature and humidity combined with increasing altitude improved the likelihood of contrail formation.

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