Hi BarryB,
I think from reading the various threads that the vessel in question 'Perkasa' is one which is used in the lakes at a fast speed in the forward movement.
I doubt that there would be any noticeable "prop walk" in this direction, the reason there seems to be such a large discussion on the direction of twin props is possibly drawn from "close quarters handling maneuvers" as in with tugs and attendance craft. With scale models as with real size vessels there is a motion found when astern is engaged. This motion can and is counteracted by opposed rotation. (I will say that it is not the only way) also as you have possibly read that the different directions create different results in such as 'innward' = one 'outward' = another and then on a different shaped hull it could even reverse those findings.
I even have the pleasure of working aboard a tug that has both props turn the same way, (be it that they are in Kort's) but this even shows up in having tows on the 'hip' we tend not to ride on the STBd as steerage is not too good, but ride on the Port and control is super.
In all of this I would state that there is no correct or wrong way to have prop direction, but to find out what is the best running on your build and have it at that. (purists will no doubt hound me for what I have said)
I may not have been building models for very long and I will be honest and say I am still learning thanks to the wealth of knowledge on this forum alone.
Just read through this again and Ouch I sound hard! where I was only trying to mark out the differences as I said I don't see a right or wrong way but it would be what way you (the model Maker / opperator) found to be acceptable. I hate smileys but :) :)
R,
