Mxsmanic wrote in
:

Snowbird writes:

Now, the induced drag is
creating the tip vortices, which presumably descend, but parasite
drag has no vertical component, so in theory it should stay in place.
So according to this, the higher the airplane's relative speed, the
slower the wake will descend (if at all).

The entire air mass behind the aircraft is descending.

No,m it isn't., fjukktard.

you're wrong... again..


Bertie