Jan Mogren From Sweden, joined Dec 2000, 2029 posts, RR: 58 Posted (6 years 2 weeks 9 hours ago) and read 676 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?
Donder10 From Canada, joined Oct 2001, 6656 posts, RR: 30 Reply 3, posted (6 years 2 weeks 7 hours ago) and read 593 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
FSPilot747 From United States, joined Oct 1999, 3599 posts, RR: 21 Reply 4, posted (6 years 2 weeks 7 hours ago) and read 575 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.
Bio15 From Colombia, joined Mar 2001, 1051 posts, RR: 10 Reply 8, posted (6 years 1 week 6 days 1 hour ago) and read 328 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........
Now seriously, nothing but a photo edit.
Only trust airliners.net pictures
Meister808 From United States, joined Jan 2000, 964 posts, RR: 2 Reply 9, posted (6 years 1 week 6 days 1 hour ago) and read 320 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
Bio15 From Colombia, joined Mar 2001, 1051 posts, RR: 10 Reply 10, posted (6 years 1 week 6 days ago) and read 311 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.
Lehpron From United States, joined Jul 2001, 7027 posts, RR: 31 Reply 11, posted (6 years 1 week 5 days 23 hours ago) and read 310 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.
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