For a whole lot more science on these phenomena NASA has a publication “Patterns in the Sky”
https://ntrs.nasa.gov/citations/19950024579
Credit to Dr Chris Combs for this idea:
THIS IS NOT A SONIC BOOM
Okay folks, it’s been long enough. Time to finally address the biggest point of confusion on #AvGeek twitter: what exactly is going on with vapor cones?
Let’s just say much of what you’ve read is (probably) wrong. Wonder no more: a thread… 1/n pic.twitter.com/wJ0QoA2rcG
— Chris Combs (iterative design enjoyer) (@DrChrisCombs) September 1, 2020
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