Quote:
Originally Posted by freebeard
There is some optimal angle— for various crosswind conditions. 
The fill piece for whatever angle can, apparently, be flat-angled curved or stepped. |
I've also seen 10 degrees to allow for crosswinds.
Either way I understand you gain some additional amount with v.g.s. I suppose how much will just have to be determined during test.
I suppose generally the closer together the trailing edges, without having the airflow break away, the better. Some other optimum arrangement may exist though.