otnmbrd wrote in message
k.net...
Single screw .... With full left rudder, kick ahead, bow will
swing to
port .... due mainly to rudder and some prop walk (right hand
prop).
With rudder hard left, kick astern, stern will swing to port
..... all
prop walk, has nothing to due with rudder placement(rudder
could be hard
left or hard right, initial affect will be the same).
The only way to shield a prop from prop walk, that I know of is
a Kort
Nozzle or similar shield.

There's very little prop walk on traditional wood trawlers, when
the prop is set almost half way down a 3m deep keel in a cutaway.

Also, many Greek fishing vessels (enormously over-engined with
old bus engines 300hp driving a 30ft caique) to put long skegs in
front of the prop and big lateral plates extending sideways at
water level to stop air being drawn into these mammoth blades.
This also keeps nets and ropes clear, and seems to minimise prop
walk.

I don't know a Kort nozzle, but if it's a protective cylinder
around the prop with a skeg and cross shaped blades supporting it
in front, that's what I meant by 'shield'. Some old, single
engined tugs used to use these and I suspect the Greek approach
is a half way house.

Also on hydrofoils, where the prop is 2m deep with no hull
interference in sight. But that's a bit exotic, since most
hydrofoils are twin screw.

JimB