In my experience, the only time I might enjoyea rudder with my Blackwater is when paddling downwind in a brisk wind. Like most of my canoes, it wants to weathercock into the wind, regardless of my seat postion trim, but I have always been very lightly loaded when that has happened. In a strong following wind, I end up pointed cross wind at best, rather than heading straight downwind, and it may be quite difficult to turn and hold a downwind direction. I do not know what would happen with a heavier load. The same thing has happened with my Shadow, most notable and troublesome during a race I was in, even with a double blade (bite your tongue) paddle that is requred to use in the solo-rec class which that canoe races in. Still, I would never use a rudder, which would not be allowed on any canoe class craft during a canoe race.