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It`s not as bad as you think....

Community Veteran
Posts: 17,764
Thanks: 1,603
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Registered: 06-11-2007

It`s not as bad as you think....

  DWh2f83W0AA7WKI airplane.jpg

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A misty morning arrival for a British_Airways 777 at HeathrowAirport. © Wael Al-Qutub

 

 

3 REPLIES
Pete11
Seasoned Pro
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Registered: 17-02-2017

Re: It`s not as bad as you think....

It'll never pass an M.O.T. with emissions like that.

A float tip is pleasing in its appearance and even more pleasing in its disappearance.
Growing old is inevitable...But growing up is optional.
Community Veteran
Posts: 14,381
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Registered: 01-08-2007

Re: It`s not as bad as you think....

It's still cleaner than a volkswagen..

(and skoda lol)
I need a new signature... i'm bored of the old one!
ffox
Rising Star
Posts: 297
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Registered: 08-06-2011

Re: It`s not as bad as you think....

@shutter: That's a good photo!  The rising sun is just at the right stage to make it look really dramatic.

 

Here's another:

Q78za.jpg

 

The reduced pressure on the top of the wing (lift) causes a drop in temperature.  At cruising speeds it's spread over the top surface, but slow speeds require high angles of attack when the reduced pressure area is concentrated near the front. Because the area is smaller the pressure has to be lower to maintain the lift.  At times the temperature drop is sufficient for the water vapour to condense.

The same thing happens in a high-g turn.

There's a good article on the subject here:  https://tinyurl.com/y8pye6mb