You're welcome. BTW, this magnified image from the CBS video that TXnMA posted in #235, looks a lot like what's supposed to happen when a jet aircraft's wingtip vorticies interact with it's engines' contrail.
You do realize that TXnMA busted that pic as a crossfade aka crosswipe which is an editing tool used to transition smoothly between two separate pieces of video tape. What you see there is not two vortices from the two wings of an airplane it is two separate pics of the same plume overlaid one on the other like a double exposure.
Um -- R_M, just to keep us on a factual basis here, that image I posted in #235 is not one contrail. I was showing how CBS editors blended two video clips together during a "crossfade transition" -- producing frames that have images of
two contrails (actually the same one at different times) in the same frame. IOW, not a good example of vortex spiraling.
BUT, see #357 for photos that unequivocably support your position.
