I do not like the purpose of this piece, but look at the beautiful wake and the laminar/turbulent interface

The electric cannon delivers shells over 200 miles at Mach 5
The first firing of the railgun in January 2008, was an historic and spectacular occasion

I’d like my Introduction to turbulence students, using the self-similar structure of the wake and the dimensional analysis to know from the photo (if the time is known) when it left the gun. Like the story about G.I. Taylor that discovered the size of the nuclear bomb from the series of photos. The power of dimensional analysis.

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