Thank you Darryl for sharing your ideas and results!
Your posts here are most interesting and stimulating and contribute to making this forum worthwhile.

But I think most of us agree that trying to understand why something works is a prerequisite for developing technology further.

The most significant mechanisms of operation have been presented already by Darryl and others:
- Reducing pitching, thereby preventing airflow over the sails from becoming detached.
- Keeping the bows from going down downwind, allowing driving the boat harder.
- Reducing tip-vortex drag - if one gets the wings right.

However, I would like to add one factor that may contribute positively in some conditions:
The horizontal wing may act as a paddle as the boat pitches in small waves, hence the wings MAY contribute forward motion. This effect will be stronger if the wings are allowed to move some degress up and down (as I14-wings do?)

Darrryl: What kind of rudder fittings do you use?
Can you show us more pictures?

Stein