I recently read about a 75' Northern Marine with a single screw with twin rudders. In the blog post the owner stated that after he purchased the boat he noticed the rudder activity just wasn't right. He did some research and consulted with some naval architects and they recommended twin rudders on the single screw. After this modification the owner now states his vessel tracks like a slot car.
I did some googling and found a lot of information about large ships with single screws and twin rudders but I didn't really find anything substantial about this set up for smaller recreational vessels. That said, does anyone have experience with this type of set up on a recreational boat or know of a source for solid information on this topic?
Note: Not looking for personal opinions, unless of course you have first hand experience. What I'm looking for is researched evidence from professionals, good or bad, about twin rudders on a single screw recreational vessel, specifically a full displacement "trawler" type vessel.