I don't have any special wake entry in my sim.cfg file for the Patuxent so it must be the default. Not sure you can do all that much tweaking this effect. I have a lot of carriers and ships and some come with different wake effects, however the look of the wake seems to depend less on the design and more of how you are viewing the ship. I often see anomalous things, like the wake running under the ship from the bow, and also it disappears and then starts again stretching out behind the ship after switching views and that kind of thing.