(speaking of prop walk)
I like
to think of it as a jet of water created between the prop tips and the
hull, but I'm not sure if that's an accurate visualization or not.

JAXAshby wrote:
it is caused by asymetrical thrust of an angled prop shaft.

Oh, really? If that is true, then a saildrive or a design with a
perfectly horizontal prop shaft would not have any prop walk.



It is also caused to some extent by the contrainment of the prop wash against
the hull on the up side blade, compared to no constrainment on the down side
blade.

If that were true, then surface drives would not exhibit any prop walk
either.


the prop will will "walk" in the direction of movement of the bottom blade.

Unlike the previous parts of your post, which is just plain wrong, this
is backwards. Prop walk will push the stern in the opposite direction to
that of the bottom arc of the propellor.

Fresh Breezes- Doug King