Seems to me it's not that hard for real engineers to come up with a formula that will predict the top speed of a given platform, it's not rocket science, it's basic; weight and drag, vs. lift and thrust, and apply it to any foiling cat. I'm pretty sure the guys at Boeing and Airbus have been doing it for many years. I'll bet the foiling C cats have already figured it out too.

The question is, how are the class rules going to be written? Are they going to allow development to find the most efficient foils?

Here's a thought, have two 'rules' for PN's. "Straight boards" and "Curved boards".

We already have the numbers for straight (non-foiling) boards. The guys who want to foil need to come up with better boards, so they can foil on every point of sail. The Moths did it. The Phantom did it. The AC boats did it. Just do it. But to try to come up with a PN for foiling vs. non foiling, is just like Kite Cats vs. mono-slugs.