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Contrails Not From Engines  
User currently offlineJan Mogren From Sweden, joined Dec 2000, 2043 posts, RR: 50
Posted (10 years 10 months 4 weeks 1 day 20 hours ago) and read 1766 times:

A month or so ago I shot this aircraft overflying. I didn't see anything special until I checked the photo later.
The contrails seem to come from the wings. Also note the rainbow effect.
Probably has to do with ice crystals?



I can't remember seeing this before.

/JM


AeroPresentation - Airline DVD's filmed in High Definition
11 replies: All unread, jump to last
 
User currently offlineGarnetpalmetto From United States of America, joined Oct 2003, 5395 posts, RR: 52
Reply 1, posted (10 years 10 months 4 weeks 1 day 19 hours ago) and read 1730 times:

It's the chemtrails man! The man's trying to keep us down man! *puts on tin foil hat and goes into his bomb shelter to light one up*


South Carolina - too small to be its own country, too big to be a mental asylum.
User currently offlineJan Mogren From Sweden, joined Dec 2000, 2043 posts, RR: 50
Reply 2, posted (10 years 10 months 4 weeks 1 day 18 hours ago) and read 1699 times:

LOL !
But really, has anyone seen this before? Have I just missed it ?
/JM



AeroPresentation - Airline DVD's filmed in High Definition
User currently offlineDonder10 From Canada, joined Oct 2001, 6660 posts, RR: 21
Reply 3, posted (10 years 10 months 4 weeks 1 day 18 hours ago) and read 1683 times:

Jan,
there was another post somewhere(might have been elsewhere)on a similar topic,I'll try to dig it out.I believe it's to do with atmospheric conditions but I'll have to check.
Out of interest,what focal length was that taken at?
Cheers,Alex


User currently offlineFSPilot747 From United States of America, joined Oct 1999, 3599 posts, RR: 12
Reply 4, posted (10 years 10 months 4 weeks 1 day 17 hours ago) and read 1665 times:

Jan Mogren,

Contrails can form in two ways, from the engines, and from the cooling process--the air flowing over the wings. When the cooling is sufficient enough to saturate the air, you get a "dynamic contrail," which looks like what you've got there. It usually dies fast in the plane's wake.


Cheers


User currently offlineJan Mogren From Sweden, joined Dec 2000, 2043 posts, RR: 50
Reply 5, posted (10 years 10 months 4 weeks 1 day 16 hours ago) and read 1628 times:

Alex,
it was a 300mm, cropped just the middle part of it.

FSPilot747
to the naked eye they looked like normal contrails as far as I can remember now, but perhaps they died out quicker?

/JM



AeroPresentation - Airline DVD's filmed in High Definition
User currently offlineSAS-A321 From Denmark, joined Mar 2002, 401 posts, RR: 0
Reply 6, posted (10 years 10 months 4 weeks 1 day 6 hours ago) and read 1529 times:

Looks like an SAS MD80 or MD90. Where was the picture shot?


It's Scandinavian
User currently offlineJan Mogren From Sweden, joined Dec 2000, 2043 posts, RR: 50
Reply 7, posted (10 years 10 months 4 weeks 1 day 5 hours ago) and read 1521 times:

Onsala, just south of Gothenburg.
/JM



AeroPresentation - Airline DVD's filmed in High Definition
User currently offlineBio15 From Colombia, joined Mar 2001, 1089 posts, RR: 7
Reply 8, posted (10 years 10 months 4 weeks 12 hours ago) and read 1418 times:

Oh my god, I think they...... uh............... no it can't be............ just maybe............ CHEMTRAILS!


The photo is probably edited. Look at the "contrails" and they don't even come out of the engines. The true contrails are formed a short distance away from the engines exhaust nozzle, not beside it. They also generally come out in the same axis line of the engines, not to the side. There's nothing strange on that picture. Except, obviously, the two thinner lines which are chemical trails put in the aircraft by some dudes to help with the government conspiracy, and blah blah........  Smile

Now seriously, nothing but a photo edit.
Only trust airliners.net pictures  Smile

-Alfredo


User currently offlineMeister808 From United States of America, joined Jan 2000, 973 posts, RR: 1
Reply 9, posted (10 years 10 months 4 weeks 12 hours ago) and read 1410 times:

How is that a photo edit? It seems to me that everything lines up pretty well for dynamic contrail, as FSPilot747 talks about. It makes sense that a dynamic contrail would come from the inboard wing, where there is the least disturbance, and then it can even be seen where the jet wake comes into the picture, where the contrail gets choppy on the inside.

-Meister



Twin Cessna 812 Victor, Minneapolis Center, we observe your operation in the immediate vicinity of extreme precipitation
User currently offlineBio15 From Colombia, joined Mar 2001, 1089 posts, RR: 7
Reply 10, posted (10 years 10 months 4 weeks 11 hours ago) and read 1401 times:

You're absolutely correct Meister. I missed the engine trails forming near the disturbances. I had thought that if there are no engine generated trails there should be no wing generated ones, therefore it's edited. Good observation, I'll take back my previous comment on it being a photo edit.


Still positive on the chemtrails though

 Smile nah just kidding
-Alfredo


User currently offlineLehpron From United States of America, joined Jul 2001, 7028 posts, RR: 21
Reply 11, posted (10 years 10 months 4 weeks 10 hours ago) and read 1400 times:

More than likely, the vortices coming off the wings interfere with the jet exhaust and mostly expand the contrail out so it may appear to have more than one source, being the engine. Other than engine pressure, that is one of those reasons.


The meaning of life is curiosity; we were put on this planet to explore opportunities.
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