If wanting to build recognition I think "FAST16" would catch more than Formula. The idea that "formula" somehow aligns the boats with formula one racing is lame so why be attached to the word.
I would go so far as to say the title of the class SHOULD be changed to that because Formula 18 will always outgun the glass in the publics eye....like formular one against formula three.....formula three is always the youngies class.

A logo on all boats would be great but many might not like that request.

NO ONE other than cat racing geeks can see the diference between these boats. Often on a beach an actual sailor will come up to me and ask if my boat is a this or that.......they just see catamarans that are newish or older and can get the difference between a 14 and an 18 because the size ratio is substantial enough to be obvious.
Logos mean so much and F16 says nothing to most people. "FAST16" people can understand and will not forget.

A weight restriction on the heavier boats like the T which sent lighter people onto the FAST16 platform would also help.

Before the purist write at me about the word formua representing what the boat actually is and the reasoon the boat is constructed to specific measurements making it a "class" which speaks to its racing format.....no one out there cares...that is geek stuff.

The Hobie 16 is recognised by millions, not because they know what it looks like and can pick it from another boat but because it is a name they have heard.........formual 16 formula 18 formula 14.......the average joe will never care.

A Normie out there will at present think a Hobie 16 is much sexier than an F or Formula 16 because of the name. Having a groovier F on the logo will mean nothing out on the street.

Even the "FAT16" would be better, speaking to the fat top sails.....creating a vision in the people eye of romance.