Thanks Luiz for your patience.

Your picture answered my vague question. I was speaking about a rudder foil for pitchpole prevention. (as per the stealth rudder)

I haven't had the pleasure of a pitchpole, (H14) although on the first time out I came within a hair of one. The cold water temperatures here make the idea an uninviting one!

I had the time this afternoon to check out all the websites on the posts and now am much clearer on this fascinating subject. (took awhile on my dialup service)

I remember years ago a picture in a windsurfing book of a guy on foils in Hawiai.