No. Among of many practical reasons, it will not be beneficial. We had this discussion a couple of days ago (search for wingsail) You can also ask Ben Hall. He sailed a wing on a A-cat in 2008, and wasn't superior to soft sails.
Cheers,
Klaus
I wouldn't consider that experiment "final". Just because the first one of it's kind didn't prove superiority, I'm sure that's not the last rigid wing sail we'll see on an a-cat.
