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Video: Wing Condensation From Inside The Cabin  
User currently offlineMattnrsa From United States of America, joined Dec 2002, 393 posts, RR: 1
Posted (6 years 5 months 5 days 16 hours ago) and read 3101 times:

We've seen the photos of planes taking off with condensation forming at engine inlets and over the wings...


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Photo © Jason Whitebird
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Photo © Gerhard Plomitzer



I thought some of you would be interested in a video of the condensation during a takeoff roll from inside the plane. It's the first video of mine that really captures the effect. You can see it in the number four engine inlet through most of the takeoff roll and over the wing at rotation. Enjoy!

http://www.youtube.com/watch?v=dyfaUn58KAA

or



8 replies: All unread, jump to last
 
User currently offlineGlobalDreams From United States of America, joined Dec 2006, 43 posts, RR: 0
Reply 1, posted (6 years 5 months 5 days 4 hours ago) and read 2932 times:

Thank you for this thoughtful and relevant post.

User currently offlineKennyK From United Kingdom, joined Apr 2005, 482 posts, RR: 0
Reply 2, posted (6 years 5 months 4 days 15 hours ago) and read 2783 times:

Great photos and video, most interesting parts of the flight, takeoff and landing, the middle bit gets pretty boring. Interesting to also see how the wing tip rises up as the speed increases.

My only 747 experience is from Manchester to Florida with 4 year old twins who changed seats every 10 minutes and most amusing was on approach to land one asked if we had taken off yet  Smile


User currently offlineGlobalDreams From United States of America, joined Dec 2006, 43 posts, RR: 0
Reply 3, posted (6 years 5 months 2 days 1 hour ago) and read 2626 times:

What causes the condensation, and why is there so much of it during rotation?

[Edited 2008-03-24 16:08:16]

User currently offlineRwy04LGA From United States of America, joined Jul 2005, 3176 posts, RR: 8
Reply 4, posted (6 years 5 months 1 day 21 hours ago) and read 2543 times:



Quoting GlobalDreams (Reply 3):
What causes the condensation, and why is there so much of it during rotation?

The curved upper wing (compared to the relatively flat lower wing) causes the air to travel over the top of the wing much faster as opposed to the bottom of the wing. That increased speed causes the air flowing over the top of the wing to decrease in pressure (causing a vacuum that lifts the wing). That lower pressure also lowers the temperature of the air and causes the water vapor in the air to condense. As an example, on a hot, humid day fill a glass with ice cubes and then add cold water. The outside of the glass will immediately become covered with water. The cold glass has condensed the water vapor in the surrounding humid air. A similar effect occurs at engine intakes whereby the inlet squeezes the incoming air, thereby reducing pressure and, again, condensing any water vapor. During rotation, more lift is generated, pressure over the top of the wing is decreased and condensation occurs.



Just accept that some days, you're the pigeon, and other days the statue
User currently offlineGerbenYYZ From Canada, joined Dec 2005, 130 posts, RR: 0
Reply 5, posted (6 years 5 months 1 day 12 hours ago) and read 2426 times:

On a flight into AMS on a KLM 747 it appeared as if we were descending through cloud all the way down, it turned out to be a cloudless morning but the condensation coming off the wing made it difficult to see anything out of the window.

User currently offlineNEMA From United Kingdom, joined Feb 2006, 712 posts, RR: 0
Reply 6, posted (6 years 5 months 1 day 9 hours ago) and read 2310 times:

Seeing take offs and landings never lose their spectacular appeal and it always looks that little bit extra stunning with the condensation effect.


There isnt really a dark side to the moon, as a matter of fact its all dark!
User currently offlineVoodoo From Niue, joined Mar 2001, 2074 posts, RR: 0
Reply 7, posted (6 years 5 months 1 day 6 hours ago) and read 2208 times:

Caused by interference from electrical/video device below 10K feet?  duck   duck   duck   duck 


` Yeaah! Baade 152! Trabi of the Sky! '
User currently offlineMattnrsa From United States of America, joined Dec 2002, 393 posts, RR: 1
Reply 8, posted (6 years 5 months 23 hours ago) and read 2055 times:



Quoting Rwy04LGA (Reply 4):
The curved upper wing (compared to the relatively flat lower wing) causes the air to travel over the top of the wing much faster as opposed to the bottom of the wing. That increased speed causes the air flowing over the top of the wing to decrease in pressure (causing a vacuum that lifts the wing). That lower pressure also lowers the temperature of the air and causes the water vapor in the air to condense. As an example, on a hot, humid day fill a glass with ice cubes and then add cold water. The outside of the glass will immediately become covered with water. The cold glass has condensed the water vapor in the surrounding humid air. A similar effect occurs at engine intakes whereby the inlet squeezes the incoming air, thereby reducing pressure and, again, condensing any water vapor. During rotation, more lift is generated, pressure over the top of the wing is decreased and condensation occurs.

That's a great explanation...I've never seen it explained so clearly! All I knew was that you needed moisture in the air, and that's why we hardly ever see it in DEN!


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