Yes the split rudder is a proven concept and has been around for many years as a type of airbreak. However that was not why I chose to split the rudder on the passport. I did so to help deaden the rudders effectiveness around the center. Basically when a rudder input is given only half the rudder moves the other half stays straight. It is that way accept for stall turns, then both halves move together. By doing that for normal flight it has allowed the use of the wing tip fins in order to be able to have the same charecteristics in yaw that a bipe has. I was very pleased with the proto-type in every way, and the only changes we made to these was one more degree anhedral in the stab and a little more dihedral in the wing. Looking forward to the test flight in the next day or so.

Chip