The atmosphere where the plane is flying needs to have low vapor pressure and low temperature. There are three types of contrails. The short lived ones that only last a couple minutes after a plane passes. To recap, airplanes leave behind a trail of white smoke due to the mixing of hot and humid air with cool and dry air. Exhaling causes the hot and humid air in your mouth to mix with the cool and dry air outdoor air, resulting in condensation that looks like white smoke.
When researching some of the different types of washers used in the aerospace industry, you may Hoses are commonly used in both automobiles and airplanes. Consisting of rubber tubes, they are We use cookies to improve your experience.
By your continued use of this site you accept such use. For more information, please see our privacy policy. I'm sorry!! I was simply pointing out that these trails do not "fade and disappear" like your article said. This was my first visit to Wonderopolis and I will be returning. Thank you for your good sport and positive attitude when everyone is seemingly picking apart your article.
Hi I agree with you and am looking into it myself. I think its magical and they are trying to get our attention for a spiritual awakening especially with all the shifts happening with our universe. Hi, gina! Welcome back, Ryan! We also want to make sure that we are representing the scientific evidence behind this WONDER, which is how the exhaust trails are formed.
This is why we chose to remove part of your posting. Contrails do exist like Wonder is stating, but they fade fairly rapidly after an airplane paases an area. A Chemical Trail aka ChemTrail that is being sprayed, exhausted, etc, by aircraft does not dissipate. Can Wonderolis explain what or why aircraft, more specifically airplanes, are spraying ChemTrails? Those are great questions, Joe! Maybe you could do further research on the topic at your library.
Hi Amy! Some scientists are concerned that the exhaust trails may affect Earth's climate. There are many different beliefs about this topic. That's true, Mohit Dagar. Why do you think that is?
Thanks for sharing your thoughts, Jan! We think you're right, that it's not normal procedure to fly back and forth and completely cover the sky with contrails -- usually planes are just passing through, getting from point A to point B! We think you're right, that it's not normal procedure to fly back and forth and completely cover the sky with contrails" -So why keep doing it if you think its not normal, STOP doing it let nature takes its course!!!!
Thanks for sharing your thoughts, Jeremy. Excellent argument, Laney! Keep in mind the reason contrails linger in the sky so long has a lot to do with the temperature at that height.
If this was a normal byproduct of jet plane exhaust, it would have been in the sky prior to the late 's but it wasn't. The frequency and number of trails in the sky has greatly increased since they started out as a rare phenomenon in the last 's.
Hi Rich! It could be used for communication purposes! Some airplanes even write words in the sky with their tracks! Have you ever seen that before? Hi EH! Planes leave the lines behind them as the exhaust leaves the engine and combines with the air vapors! Hi there, Tera, thanks for joining us at Wonderopolis today!
We sure are glad that you commented on our flying Wonder, too! Those artificial clouds in the sky are actually exhaust gases from the airplane. You might have seen exhaust gases from the tailpipe of a car-- the same is true for airplanes! We hope you have a great day, Tera! Please come back and visit us soon! We are undergoing some spring clearing site maintenance and need to temporarily disable the commenting feature. Thanks for your patience. Drag a word to its definition.
You have answered 0 of 3 questions correctly and your score is:. Want to add a little wonder to your website? Help spread the wonder of families learning together. We sent you SMS, for complete subscription please reply. Follow Twitter Instagram Facebook. Why do airplanes leave tracks in the sky? What are contrails? How do pilots use planes to write in the sky?
Tags: See All Tags airplane , artificial , cloud , cloudy , condensation , contrail , evaporating , exhaust , pilot , plane , sky , skywriting , track , trail , vapor , water. Not exactly… Skywriters use small airplanes equipped with special smoke machines to fly in special patterns to create written messages visible from the ground.
Wonder What's Next? Try It Out Ready to make your own contrails? Don't worry, though, you can still have fun checking out one or more of the following fun activities with a friend or family member: Do you ever make homemade cards for your friends and family members on their birthdays? There's nothing quite like a heartfelt message written by hand in a card you made yourself.
Of course, paper limits you a bit in terms of the impact your message can have. But what if you had the whole sky as your canvas?
What would you skywrite to a friend or family member if you had the chance to write any message in the sky for them to see? Think about it and then tell that person what you would write if you could write in the sky. You never know when you just might make someone's day! Is it cloudy outside today? We hope so! Because this activity requires some clouds. Head outside with some friends or family members and lay out a blanket so you can comfortably gaze at the clouds as they cross the sky. What shapes do you see?
Pick out a certain area of the sky and see what you can see. Do your friends or family members see the same things you do? Compare your observations. How are they similar? How are they different? Have fun cloudgazing and using your imagination to give the random clouds some meaning! If you're up for a challenge, try this fun experiment at home with just a few simple supplies.
Grab a clear plastic 2-liter bottle, matches you'll need an adult to help with this experiment and some warm water. Just follow the directions to create your very own Cloud in a Bottle! Did you get it? Test your knowledge. Wonder Words airplane track sky trail trace streak artificial fume dense exhaust vapor contrail condensation evaporate canvas navigation smoke fade Take the Wonder Word Challenge.
Join the Discussion. Lilly Feb 19, So, why the same airplane can stop doing it from one moment to another in same weather conditions?
Feb 20, Hey, Lilly! It's now or never. Typically, an aircraft's emissions include carbon dioxide, water vapor, nitrogen oxides NOx , carbon monoxide, hydrocarbons such as methane, sulfates SOx , and soot and metal particles. Planes like the Boeing eject huge amounts of water, about 2. Contrails are extremely similar in composition, though differ greatly in their life span.
The weather directly influences how long a contrail exists for. Contrails are generally classified in three distinctions: short-lived, persistent non-spreading , and persistent spreading.
Short-lived contrails resemble short white lines which tail the plane. As their name suggests, the trails only last a few minutes before they disappear nearly as fast as they are made. The air which the plane travels through is somewhat moist with only a small amount of water vapor available. Any ice particles created quickly return back to a vapor state. Source: NASA. Persistent non-spreading contrails are much longer white lines which remain visible for a long time even after the plane disappears.
The air which the plane travels through is rather humid with a large amount of water vapor available to create a trail. Persistent spreading contrails are similar to non-spreading trails. Though, they spread out over a larger distance because of turbulence or other weather conditions.
Their large area and life longevity make them the most likely to affect climate. Contrail cousins resemble contrails though differ slightly in the physical process which creates them.
One of the most common type of contrial cousins are the vapor trails which extend from the wingtips of a jet, typically during takeoff or landing. Weather permitting, if the pressure of the vortex at the end of the wingtip drops enough, a trail will form. Under the right conditions, liquid water forms drops inside the vortex making them visible.
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