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Mar 30,  · Rather, the white smoke created in their wake is condensation-based contrails. To recap, airplanes leave behind a trail of white smoke due to the mixing of hot and humid air with cool and dry air. It’s essentially the same phenomenon that occurs when you exhale on a cold winter day. Jul 06,  · Airplanes or jets leave a white trail of smoke behind them, which you mostly see in the sky. It is the hot, humid exhaust that releases from the airplane gets mixed with the atmosphere, due to lower vapor pressor and temperature at high altitudes. and then the exhaust gas. Most aircraft that leave trails aren't leaving smoke. It's condensed water vapour; essentially, clouds. These are called contrails. This can be caused by the water in the engine exhaust condensing, or by the disruption of the air by the passage of the aircraft triggering the .
Why do those long, white clouds form behind jets flying high overhead? The clouds that jets form on certain days are called condensation trails or contrails. Some days, the contrails will form thin lines that cross the entire sky. Other days they will be much shorter, and on some days there will be none at all. Jul 06,  · JET PLANES LEAVES white trails because of the hot,humid exhaust from jet engines mixes with the with the atmosphere  which at high altitude is of much lower pressure and temperature than the exhaust www.- vapour contained in the jet exhaust condenses and may freeze,and this mixing process forms a cloud. 0 votes 0 votes. Apr 15,  · Vapour trails, or Contrails, are formed when hot, humid and high pressured AIR (not fuel or chems) from an aircraft engine is mixed with the surrounding air that is at a low temp and pressure.

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