Once again, great info. That confirms what I had in mind. The front little speed demons who take the brunt of the cone are pushed to the wayside to the outer portion of the pattern in the fringe area and begin to lag behind with a slower individual velocity. And what you've described would account for the change in the traverse direction as opposed to the longitudinal. I haven't replicated Mr. Brister’s experiment just yet. Fluids, thermo, etc. will yield a very complex model. The only thing missing is plasma.

Kind Regards,

Raimey
rse