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It was an obscure refrence to breaking rocks in prison. No wonder you're preplexed.
Generically the wake is two counterrotating vortexes, up on the sides and downward in the middle. Those would be the big ones.
The vortex generators add energy, harvested from drag, to a zone that [otherwise] wants a sharp separation edge, Similar to a wickerbill the flow is reoriented toward the centerline, reducing the volume. Those would be the little ones
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Three conspiracy theorists walk into a bar --You can't say that is a coincidence.
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