The F18 class rule is not really the issue here. NONE of the Formula classes include brand names in their results, rule or not.

I just figured that maybe Formula classes think of themselves more like one-design classes. And one-design classes also do not list manufacturers in their results. That includes the Tornado, Optimist Dinghy, Snipe, Lightning, Star, and Soling, to mention a few. (And some of them have lots of manufacturers, and can include a variety of building techniques and materials.)

But even in the case of one-designs, I would like to know the manufacturer and sailmaker and construction method, whether home-built or factory.

Wouldn't you?