Surely an angled luff produces vertical lift forces trying to lift the bows up BUT it also produces horizontal thrust forces which in turn are trying to push the bows down.
What will the net result be ?
Read this analysis made by a Finnish sailmaker.
http://www.sailingsource.com/cherub/aero.htmClearly guys this issue is more complex than we would like to believe.
I can tell you from my own analysis that the diving is not only the result of a balancing act between thrust and lifting but also the course is an important factor. Typically spinnakers and gennakers sail noticably deeper than spi less boats and this more instrumental in reducing dive tendency than the headsail lifting characteristic is.
Sorry Luiz, it's not that simple.
Wouter
