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Old 16th February 2020, 03:06 PM   #14
Lurch
Master Poster
 
Join Date: Sep 2016
Location: Ottawa
Posts: 2,530
Myriad,
The Earth's surface curves pretty much exactly 1 degree over a 60 nautical mile traverse, and so for a 72 statute mile long contrail, it will curve just a tad over a degree.
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