Sounds more like you are out to find a polar diagram for the Blade F16? A polar diagram would give you the target speed/angle for any given course. You can generate a polar diagram in gpsar I think, but how do you know you have the boat at its optimum VMG <img src="http://www.catsailor.com/forums/images/graemlins/wink.gif" alt="" />
There was some talk about getting GPS units on the top performers at the GC at Zandvoort, but I guess it never happened? Getting quality data like this, and making it available for members as a membership advantage would be something new and very valuable I think! It removes the uncertainty of going to an event and finding that you are totally off pace. It also makes it easier to experiment like you want to do.