Who's Online

We have 1666 guests online

Live Traffic Feed

Life in the Skies

'A Local Bestseller!'

What Tony says
(See here)
and Book Launch video here
 
What others say

Les Posen
(See
here)

Yvonne Lee
(See
here)

Louisa Lim & Allan Koay
(See
here)

Aireen Omar, Asran & Bo Lingam
(See
here)

38 Readers' Comments
(See here)

Get an autographed copy here

AMAZON.COM  -  To Order, please Click here 

(eBook) Kindle edition - please Click here

Latest Comment

Does a jet aircraft
There is almost no curvature, because the Earth is

Does an airline capt
I dont think the interview on our side (nautical)

A successful SIA Cad
I am a 3rd year student in Singapore polytechnic.

Cadet Pilots and Pil
captain how to in to the pilot career, becausee i

The twin-engine vers
Dave, in short, it depends on the severity of the

Engine Failure of QA
I heard the Captain of that flight was undergoing

What are the eyesigh
Sir, I am interested to become an airline pilot! T

My Boyfriend is Deat
4 engines plane more safe, remmember passenger pla

Eyesight requirement
HELLO SIR; I have a specks of 1.0 no. so can i eli

Cadet Pilots and Pil
hi capt lim, i want to know that does the cadet pi

Paperback Version

 For Local Availability - Check Here
 
Home > Contrails > What am I seeing?
What am I seeing?
Weather - Contrails
Wednesday, 25 January 2012 12:34

Contrails from Singapore Airlines Airbus A380

Hi Capt Lim,

I enjoy watching all kinds of planes flying.

What is that cloud-like image I see on planes, mostly high performance, behind their wings as they maneuver?

What causes this? It seems to disappear just as fast as it appears.

Brad

Hi Brad,

What you see behind the plane’s wings (but in fact, behind the engines) is known as condensation trails or contrails. Sometimes, they are very clear and well defined; other times they are just thin lines seen across the sky. Some days they are not so clear and on other days, do not exist at all.

Contrail forms because of the presence of water vapor from the jet engines. This is one of the components from its exhaust. Jet fuel is made of carbon and hydrogen. When jet fuel burns with oxygen, most of the exhaust that comes out of the rear consists of carbon dioxide and water. The water generally exits as an invisible vapor.

I am sure you would have noticed that when you exhale or open your mouth to speak in winter, cloud of condensation would form due to the invisible water vapor from your breath.

In the summer, you don't see your breath but in the winter, when the moisture in your breath mixes with the cold air, the moisture condenses into a visible cloud.

This same thing occurs from a jet engine in the upper atmosphere. If the temperature and humidity are right, contrails would form when the moisture in the exhaust condenses.

That is why, you often see a lot of contrails crisscrossing on a clear day that generally mark the routes of some major airways but would soon become distorted when blown by strong winds and gradually dissipated from the sky.

PS. To check for any latest updates or postings, you can follow my new Twitter at @CaptKHLim


Airplane Contrails

Trackback(0)

TrackBack URI for this entry

Comments (0)

Subscribe to this comment's feed

Write comment

smaller | bigger

busy
 

Paperback Version

 For Local Availability - Check Here

Recommended By..


LIFE IN THE SKIES

'A Local Bestseller!'

Recommended by

Patrick Smith
Boston USA
(See
here)

Capt Meryl Getline
ex-United Airlines USA
(See
here)

Capt Doug Morris
Canadian Airlines
(See
here)

Capt  Robert J Boser
ex-United Airlines USA
(See
here)

38 Readers' Comments
(See here)

Get an autographed copy here

AMAZON.COM  -  To Order, please Click here 

(eBook) Kindle edition - please Click here

View Book Launch video here

Follow me

@CaptKHLim

Like What You Read?


If you like what you read, more stories are found in my book LIFE IN THE SKIES (Preview here) and you can purchase a copy here. To check for any latest updates or postings, you can follow my Twitter at @CaptKHLim or Facebook here

MH 370 Interviews

Click here to View

10 Most Popular Posts



Disclaimer | Privacy
2004 - 2011 © AskCaptainLim.com | Site Concept by eQuilec.com