Why do some planes leave smoke trails?

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.

In this manner, why do some planes not leave a trail?

These trails are actually called contrails, short for “condensation trails”. They are not smoke from the engines, they are formed when the water in jet exhaust (and there's quite a lot of it, like car exhaust on a cold day) mixes with wet cold air, and condenses and freezes into ice crystals.

One may also ask, why do planes leave smoke? Condensation in Exhaust Gases The reason airplanes leave a white smoke trail in their wake is because their exhaust gases contain moisture that condenses at high altitudes. As the airplane's engines release exhaust gases, moisture vapor is released as well.

Correspondingly, what is the smoke trail from airplanes?

Those white streaks planes leave behind are actually artificial clouds. They're called contrails, which is a shortened version of the phrase “condensation trail." Airplane engines produce exhaust, just like car engines do. As hot exhaust gases escape from a plane, the water vapor in the fumes hits the air.

What is the difference between contrails and chemtrails?

Proponents of the chemtrail conspiracy theory say that chemtrails can be distinguished from contrails by their long duration, asserting that the chemtrails are those trails left by aircraft that persist for as much as a half day or transform into cirrus-like clouds.

Why do planes leave a white trail?

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.

Why do planes dump fuel?

Fuel dumping (or a fuel jettison) is a procedure used by aircraft in certain emergency situations before a return to the airport shortly after takeoff, or before landing short of the intended destination (emergency landing) to reduce the aircraft's weight.

Do contrails turn into clouds?

Contrails form high in the atmosphere when the mixture of water vapor in the aircraft exhaust and the air condenses and freezes. Persisting contrails can spread into extensive cirrus clouds that tend to warm the Earth, because they reflect less sunlight than the amount of heat they trap.

How do contrails impact the overall environment?

They cool the planet's surface by reflecting the sun's rays, warm the atmosphere and surface by absorbing solar and longwave radiation, and even replenish surface waters through precipitation. But what about artificial clouds, particularly jet contrails; do they affect the Earth's climate too?

What is Kim trail?

Contrails, or condensation trails, are "streaks of condensed water vapor created in the air by an airplane or rocket at high altitudes." Fossil fuel combustion (as in piston and jet engines) produces carbon dioxide and water vapor. At high altitudes the air is very cold.

At what altitude do planes leave contrails?

26,000 ft

How do contrails form?

The condensation trail left behind jet aircrafts are called contrails. Contrails form when hot humid air from jet exhaust mixes with environmental air of low vapor pressure and low temperature. The mixing is a result of turbulence generated by the engine exhaust.

What is white line in sky?

The water vapor from the hot plane engine turns to ice mid-air which we see as white lines in the sky called contrails. This is the same phenomenon we see when we breathe hot air on a cold day. Long contrails form in humid conditions while short contrails form in low humidity.

What on earth are they spraying?

“Why in the World are They Spraying?” is an investigative documentary into one of the many agendas associated with chemtrail/geoengineering programs, “weather control”. We are encouraging everyone who purchases a DVD to make copies and hand out for free in support of our vision of making this issue known to all.

How long do contrails last?

But when the air is humid, as was the case here, contrails can be long-lived and spread outward until they become difficult to distinguish from naturally occurring cirrus clouds. Satellites have observed clusters of contrails lasting as long as 14 hours, though most remain visible for four to six hours.

Do contrails affect the weather?

Contrails and climate. Contrails, by affecting the Earth's radiation balance, act as a radiative forcing. A 2015 study found that artificial cloudiness caused by contrail "outbreaks" reduces the difference between daytime and nighttime temperatures.

What are the side effects of chemtrails?

The chemicals attack the nervous system, primarily, and cause everything from disturbed sleep, nervousness, emotional instability, memory loss, headaches, and even impaired intellect. Whether this is an intentional or accidental side effect of Chemtrails spraying remains to be uncovered.

What's the purpose of contrails?

Contrails, or condensation trails, are "streaks of condensed water vapor created in the air by an airplane or rocket at high altitudes." Fossil fuel combustion (as in piston and jet engines) produces carbon dioxide and water vapor. At high altitudes the air is very cold.

Where are the contrails?

Contrails (/ˈk?ntre?lz/; short for "condensation trails") or vapour trails are line-shaped clouds produced by aircraft engine exhaust or changes in air pressure, typically at aircraft cruising altitudes several miles above the Earth's surface. Contrails are composed primarily of water, in the form of ice crystals.

Why do some contrails persist?

As the exhaust air cools due to mixing with the cold local air, the newly formed droplets rapidly freeze and form ice particles that make up a contrail (See Figure 1). If the humidity is high (greater than that needed for ice conden- sation to occur), the contrail will be persistent.

What would happen on a plane if a door were to suddenly open?

Sudden decompression, which would occur if a plane door was suddenly thrust open, is another matter. Anyone standing near the exit would be ejected into the sky; the cabin temperature would quickly plummet to frostbite-inducing levels, and the plane itself might even begin to break apart.

Why do contrails stop and start?

In dry air, any ice crystals that form would immediately evaporate. If the airplane leaves a long trail, you can assume that the air is not only cold but humid, allowing the ice crystals to persist. If the contrail stops, then starts up again, creating a broken line, chances are the airplane flew through a dry patch.

Why are planes white?

The main reason why aircraft are painted white or light colours is to reflect sunlight. Other colours will absorb most of the light. This is crucial as when sunlight is absorbed by an aircraft, this heats up the body of an airplane.