Do
you ever think about the white lines or smoky line an aircraft is leaving
behind during its flight. Do you know what this is?? That white smoke is known
as condensation trails in short
“contrail”.
 |
Contrails are the white
lines that sometimes form behind high flying aircraft. They are actually a type
of cloud. The cloud forms because jet exhaust contains quite a bit of water. If
the humidity is high, then the contrails can persist for a long time, like
clouds do.
(Contrails
usually form above 8,000 meters/26,000 feet, depending on the temperature and
other factors)
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| F-22-Condensation-Rainbow |
Their
formation is most often triggered by the water vapour in the exhaust of
aircraft engines, but can also be triggered by the changes in air pressure in
wingtip vortices or in the air over the entire wing surface.
Depending on the
temperature and humidity at the altitude the contrail forms, they may be
visible for only a few seconds or minutes, or may persist for hours and spread
to be several miles wide..
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