Why do Airplane vents smoke?

That's because the aircraft's onboard air conditioning system is quickly cooling and condensing the humid air outside. As a result, waves of water vapour are released to make it all a good environment to breathe and travel smoothly. The whole process may often be called Cabin pressurization.



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While fuel dumps don't happen every day, they're also not uncommon. Nor do they usually represent a major emergency. In fact if an aircraft is taking the time to dump fuel before landing, that's likely an indication that the issue forcing the plane to land is serious but not critical.

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They may not be chemtrails, but contrails can affect our climate via radiative forcing, disrupting the balance between the sun's incoming solar radiation and the heat being emitted from the Earth's surface. In other words, persistent contrail clouds can trap heat in the atmosphere.

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The simple answer is yes, pilots do, and are allowed to sleep during flight but there are strict rules controlling this practice. Pilots would only normally sleep on long haul flights, although sleep on short haul flights is permitted to avoid the effects of fatigue.

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If the aircraft tried to land without dumping the fuel first, it is considered an overweight landing attempt and could place immense stress on the airframe. It could also increase the risk of fire and fuel leaking onto the tarmac.

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Water vapour is produced by planes as the hydrogen in its fuel reacts with oxygen in the air. In cold conditions (typically below around -40C (-40F)) it can condense, typically on the soot particles also emitted from aircraft engines, to a fog of droplets, which then freeze to form ice particles.

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Answer: No. The cabin is pressurized between 6,000 and 8,000 feet on long flights. Adding supplemental oxygen is not necessary, because the percentage of oxygen is the same as being on the ground at those altitudes. Question: Why can't airplane vents go into recirculation mode like an automobile?

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Pilots can and sometimes do smoke in the cockpits of business jets. These can be as large as airliners (see BBJ), but usually aren't. Even when a country and/or airline ban smoking in the flight deck, some pilots will ignore the ban and still light up.

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