# : Blue Contrail -

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## Blue Contrail

### #1Andy Ball

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Posted --

Im intrigued as to what just flew over and left this bright blue contrail. Whatever it was it was very high very loud and was moving faster than any jet fighter i have seen before. I estimate the trail to be well above the current cirrus, since it moved off NE much faster. The trail could be seen from SE (pic 2) to NW (pic 1,3). Any ideas guys?

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### #2Allenh

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• LocationCoventry

Posted --

I can't see any picures Andy.
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### #3Andy Ball

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Posted --

Ah ok, i'll try again.
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### #4Allenh

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• LocationCoventry

Posted --

Odd it definately looks blue in colour due to height maybe? but if you say the speed was unusual experimental aircraft of some type or something else??

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### #5Paul Corfield

• Group: Frouks
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• LocationPoole, Dorset, UK

Posted --

Farnborough Airshow starts today and for the rest of the week so maybe it was something to do with that.

Paul.

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### #6Allenh

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• LocationCoventry

Posted --

Chemtrails :o
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### #7Andy Ball

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Posted --

My initial thoughts were some sort of height effect, but in all the contrails i have ever seen at all times of day, with varying height i have never seen a trail take on this sort of colour. I'm assuming its due to exhaust, quick scan of the net doesn't throw anything up. Even so whether it be a plane or not, remains slightly concerning to say the least!.
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### #8EllyTech

• Group: Frouks
• Posts: 9780
• Joined: 11-March 08

Posted --

To my eye, the contrail does not appear to be blue over the thickest part of the cirrus. Potentially an optical illusion -? Further up in the image, the cirrus is broken. Could this be a very thin contrail - less opaque and therefore the blue sky is visible through it, and somehow either magnified or enhanced?

:)
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