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To: aruanan; 1raider1

Re the bottom photo — those are condensation trails. Also often observed flowing from rear wings of Indy-type cars. Re the top photo, I would guess the aircraft has broken M1.0. Below 1.0, conditions are unstable.


58 posted on 08/14/2011 6:15:38 PM PDT by famousdayandyear
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To: famousdayandyear; aruanan
Try Google or Wikipedia for Prandtl-Glauert condensation.

Cheers!

64 posted on 08/24/2011 6:00:40 PM PDT by grey_whiskers (The opinions are solely those of the author and are subject to change without notice.)
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