Willdo, I'd love for this to be true. I'm even willing to believe it does work under certain conditions. I'm currently finishing up a more or less non-steerable scale Fokker EIII and would certainly like to be able to taxi it around. However, from nearly everything I hear I will pretty much have to set it down pointing into the wind and do my best just to keep it going straight. Pretty much like the original. I just don't see how the force of the prop wash alone can turn a very slow moving plane.

Do you have something akin to a rear skid or just a non-rotating wheel. I suppose what could be happening is the skid, particularly in grass (not much of that in Southern Cal flying fields), acts as a sort of mini-plow (like the metal plows on many WWI planes) and the force fo the rudder is sufficient to "dig it in" and force the plane's tail in the desired location.