To make the foils work well enough to prevent a pitch pole is a big ask, there is a huge leverage effect of the Spinnaker on the mast sufficient for me to think ( without a clear calculation ) that any wing able to prevent this would also be creating a huge amount of drag thus slowing the boat to such a point that any gain would be nullified.

I agree with Rolf, we should be promoting a bit of experimentation and trial and see, if adjustiable T Foils did have such gains then so be it, think of it as a safety aid ( pitchpoles are pretty scary things ) but I still very much doubt it. <img src="http://www.catsailor.com/forums/images/graemlins/cool.gif" alt="" />