Isn't there a measuring/rating system somewhere in Europe that uses weight/sail area/hull length/beam/mast height measurements and then some math, to come up with a theoretical speed?

This ain't rocket surgery, it's basic physics, seems to me any good marine architect should have a formula for speed predictions using the basic measurements of weight/sail area/ hull length.

After that, it comes down to the 'quality' of the hull design/sail design and most importantly, the crew sailing the boat!

I'll be Pete Melvin and most other boat designers knows the 'speed formula' why don't we just ask them?