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Disturbence In A Contrail?  
User currently offlineAirimages From Switzerland, joined Feb 2005, 118 posts, RR: 4
Posted (7 years 9 months 2 weeks 4 days 4 hours ago) and read 1882 times:
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Hi all,

I just got a mail from somebody who wanted to know something about this pic:


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Photo © Jerome Zbinden



"I realised that there was some disturbence caused to the contrails of the top middle group. Can you perhaps explain if you know what caused it."

Unfortunately I don't know it but maybe somebody of you.

Thanks for your help!

Cheers,

Jerome

19 replies: All unread, jump to last
 
User currently offlineMorvious From Netherlands, joined Feb 2005, 705 posts, RR: 1
Reply 1, posted (7 years 9 months 2 weeks 4 days 3 hours ago) and read 1873 times:

Looks like the blur tool or something similiar, strange though!


have a good day, Stefan van Hierden
User currently offlineJetmatt777 From United States of America, joined Jun 2005, 2725 posts, RR: 34
Reply 2, posted (7 years 9 months 2 weeks 4 days 3 hours ago) and read 1870 times:

If it was an airshow I doubt those would be contrails, more like airshow dust, since this is powder/dust even the slightest amount of wind would cause a disturbance

Just my  twocents 
-Matt  Smile



No info
User currently offlineAirimages From Switzerland, joined Feb 2005, 118 posts, RR: 4
Reply 3, posted (7 years 9 months 2 weeks 4 days 3 hours ago) and read 1865 times:
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Yes true, it's not a contrail  Smile

User currently offlineMorvious From Netherlands, joined Feb 2005, 705 posts, RR: 1
Reply 4, posted (7 years 9 months 2 weeks 4 days 3 hours ago) and read 1861 times:

That was not what he was asking for guys =)!!


have a good day, Stefan van Hierden
User currently offlineAirimages From Switzerland, joined Feb 2005, 118 posts, RR: 4
Reply 5, posted (7 years 9 months 2 weeks 4 days 3 hours ago) and read 1849 times:
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But this is maybe the answer  Smile

"since this is powder/dust even the slightest amount of wind would cause a disturbance"


User currently offlineJeffM From United States of America, joined May 2005, 3266 posts, RR: 52
Reply 6, posted (7 years 9 months 2 weeks 4 days 2 hours ago) and read 1822 times:

Quoting Jetmatt777 (Reply 2):
more like airshow dust,

LOL.....what is "Airshow" dust?


User currently offlineJamesbuk From United Kingdom, joined May 2005, 3968 posts, RR: 4
Reply 7, posted (7 years 9 months 2 weeks 4 days 2 hours ago) and read 1815 times:

Quoting JeffM (Reply 6):
"Airshow" dust?

the smoke that most display teams pour out of the back of the aircrafts.


fool

Rgds --James--



You cant have your cake and eat it... What the hells the point in having it then!!!
User currently offlineGary2880 From , joined Dec 1969, posts, RR:
Reply 8, posted (7 years 9 months 2 weeks 4 days 1 hour ago) and read 1799 times:

for once i agree with Jeff. most teams say ''Smoke on'' not ''Dust on''  Wink

as for the blurr, no idea really. definatley isnt wind.

did you sneeze on the ccd possibly. almost looks like the kind of effect you may get while shooting through glass, was there maybe a smudge or something like that on your lens/filter that you can remember?

short of that, gawd knows.


User currently offlineJeffM From United States of America, joined May 2005, 3266 posts, RR: 52
Reply 9, posted (7 years 9 months 2 weeks 4 days ago) and read 1753 times:

Quoting Jamesbuk (Reply 7):
the smoke that most display teams pour out of the back of the aircrafts.


fool

Fool?

It's absolutely rediculous that anyone would think that is dust.


User currently offlineIngemarE From Sweden, joined Mar 2005, 285 posts, RR: 5
Reply 10, posted (7 years 9 months 2 weeks 3 days 23 hours ago) and read 1738 times:

Quoting JeffM (Reply 9):
It's absolutely rediculous that anyone would think that is dust.

To you or me, or anyone really interested in aviation, it might seem a bit on the "rediculous" side. On the other hand, for those who are not all that "into" it, and that might have come across the term (for example) crop-dusting, it might make perfect sense.

Now, to the issue...
If we are discussing the "anomaly" in the smoke coming from Swedish Air Force's Team60, I would say it's some kind of optical problem. Might be the glass or something stuck on the sensor, but most likely an editing problem. Looks like a small rectangular-shaped piece of the pic has been cut-out and displaced. I've never seen any aerodynamical disturbance like that before and I believe it to be highly unlikely that only 4 of 6 aircrafts in a tight formation experiences a shear, or vortice residue, creating a "hump" like that.

Hmmmm....
Anyway, Good night folks! I'm off to bed!  zzz 



In thrust I trust.
User currently offlineEadster From Australia, joined Jan 2005, 2216 posts, RR: 14
Reply 11, posted (7 years 9 months 2 weeks 3 days 22 hours ago) and read 1725 times:

Quoting JeffM (Reply 6):
LOL.....what is "Airshow" dust?

Exactly! I've never ever heard someone call it dust - I thought everyone knew it was smoke!

That from looking at it, is not an atmospheric effect, caused by turbulence, windshear, or just wind, as it would be evident on all trails from that formation.

So I'm guessing it is a fault in photo editing or a blemish on the lens used.

[Edited 2006-07-05 02:09:56]

User currently offlineJamesbuk From United Kingdom, joined May 2005, 3968 posts, RR: 4
Reply 12, posted (7 years 9 months 2 weeks 3 days 3 hours ago) and read 1607 times:

Quoting JeffM (Reply 9):
JeffM

Dude it was a light hearted joke, i guess you cant really get across jokes on the internet can ya?!?!

Ive heard a few people call it dust mainly smoke and also trails.

Rgds --James--

P.S. Its definitely a editing fault because the sky in the background of that area also looks similar (smudged)



You cant have your cake and eat it... What the hells the point in having it then!!!
User currently offlineAirimages From Switzerland, joined Feb 2005, 118 posts, RR: 4
Reply 13, posted (7 years 9 months 2 weeks 3 days 3 hours ago) and read 1600 times:
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The smoke looks on the original photo like this and my lens should be ok, never seen something like that on other photos.

Regards,

Jerome


User currently offlineJetmatt777 From United States of America, joined Jun 2005, 2725 posts, RR: 34
Reply 14, posted (7 years 9 months 2 weeks 3 days 1 hour ago) and read 1571 times:

Quoting JeffM (Reply 9):
It's absolutely rediculous that anyone would think that is dust



Quoting JeffM (Reply 6):
LOL.....what is "Airshow" dust?



Quoting jetmatt777 (Reply 2):
powder/dust

That should explain.

Quoting IngemarE (Reply 10):
To you or me, or anyone really interested in aviation, it might seem a bit on the "rediculous" side. On the other hand, for those who are not all that "into" it, and that might have come across the term (for example) crop-dusting, it might make perfect sense.

Don't worry Im interested in aviation. Im not a half way into aviation person. I spend all day on A.net or Flight Sim.  SmileAnd see below:

I called it powder/dust because it actually isn't smoke. Is it from a flame, its powder. The reason I called it powder/dust is because when you go to an airshow and a plane thats trailing "smoke" swoops low to the ground do you see the "smoke" rise? No. You see it slowly fall to the ground. I don't know of any smoke that goes down.

Quoting Gary2880 (Reply 8):
for once i agree with Jeff. most teams say ''Smoke on'' not ''Dust on''

Okay, is it smoke though? See above.

Hope that helps the confusion  Wink

-Matt  Smile



No info
User currently offlineIngemarE From Sweden, joined Mar 2005, 285 posts, RR: 5
Reply 15, posted (7 years 9 months 2 weeks 3 days ago) and read 1563 times:

Quoting Jetmatt777 (Reply 14):
Don't worry Im interested in aviation. Im not a half way into aviation person. I spend all day on A.net or Flight Sim.

If I have offended you in any way; I'm sorry!

...and what is it exactly they use!? Well, I know for sure in most cases it used to be diesel, that was sprayed into the exhaust gases.
Not too long ago though, I was at an airshow where the speaker for the Breitling team "bragged" about them being the "enviromentaly friendly" display team, because they use parafin instead of the good ol' "diesel solution". It smelled like old(ish)-style candles.



In thrust I trust.
User currently offlineJetmatt777 From United States of America, joined Jun 2005, 2725 posts, RR: 34
Reply 16, posted (7 years 9 months 2 weeks 3 days ago) and read 1561 times:

Quoting IngemarE (Reply 15):
If I have offended you in any way; I'm sorry!

Nah. Don't sweat it.



No info
User currently offlineJeffM From United States of America, joined May 2005, 3266 posts, RR: 52
Reply 17, posted (7 years 9 months 2 weeks 2 days 23 hours ago) and read 1547 times:

Quoting Jetmatt777 (Reply 14):
Im not a half way into aviation person. I spend all day on A.net or Flight Sim.

Well, why didn't you say you were an expert!?!

...and by the way...it is smoke, not dust or powder.


User currently offlineJetmatt777 From United States of America, joined Jun 2005, 2725 posts, RR: 34
Reply 18, posted (7 years 9 months 2 weeks 2 days 23 hours ago) and read 1540 times:

Quoting JeffM (Reply 17):
Well, why didn't you say you were an expert!?!

...and by the way...it is smoke, not dust or powder.

I'm sorry Jeff for having my own oppinion.



No info
User currently offlineJeffM From United States of America, joined May 2005, 3266 posts, RR: 52
Reply 19, posted (7 years 9 months 2 weeks 2 days 22 hours ago) and read 1535 times:

Quoting Jetmatt777 (Reply 18):
I'm sorry Jeff for having my own oppinion.

No need to be sorry for having an opinion....I'm just telling you what the stuff actually is. There is a difference.


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