The rudders are designed and built by Hans Klok. I've only sailed with them once so far, but they seem to work very well. Hans has designed them so that they can be flipped to the inverted position shown in the photo, which I understand is not possible with the AHPC rudders. This works well, because it means that as you land you can get the leeward rudder completely clear of the water and still retain full control with the windward rudder. You can then pop the windward rudder at the last moment.

Paul