777DadandJr
Topic Author
Posts: 1484
Joined: Wed Feb 09, 2005 7:37 am

At What Temp Do Contrails Form?

Sat Nov 05, 2005 5:29 am

Hi all,
I was noticing the other day all the contrails in the sky over my house. I live in York Pa, about 90 miles northwest of PHL, and about 150 miles southwest of EWR. I am also within 200 miles of BWI, JFK, IAD, and DCA, so I tend to see lots on contrails. York Pa is major fly over country!
Usually in the morning, on my way to work, the sky is totally streaked with contrails during the westbound morning rush. Made me wonder about when contrails form.
About what tempature do they form? Also, if I look at some of them, I can see what seems to be maybe 20 miles long, and some start and stop. Is that cause by a warm updraft? I dry patch of air?

Thanks in advance!

Russ
My glass is neither 1/2 empty nor 1/2 full, rather, the glass itself is twice as big as it should be.
 
Electech6299
Posts: 606
Joined: Fri Aug 19, 2005 11:13 am

RE: At What Temp Do Contrails Form?

Sat Nov 05, 2005 9:04 am

The topic han be found discussed in detail in this thread:
http://www.airliners.net/discussions/tech_ops/read.main/55508

Hope this helps!
Send not to know for whom the bell tolls...it tolls for thee
 
777DadandJr
Topic Author
Posts: 1484
Joined: Wed Feb 09, 2005 7:37 am

RE: At What Temp Do Contrails Form?

Sun Nov 06, 2005 3:23 am

Thanks Electech,
That was very helpful indeed!

Russ
My glass is neither 1/2 empty nor 1/2 full, rather, the glass itself is twice as big as it should be.

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