I posted this in the No Wake Zone, but I can see now that was a mistake. This is a better forum for my question.

So here's a question I have: Why do some jet boat hulls use what appear (to me) to be cavitation plates? The Southwind tunnel dragster hulls come to mind immediately. Does it have to do with the shape of the hull on that model? Is it a drag race or circle track thing?

A guy down the street from my folks' house in Vegas has a bare hull in his yard, and it has plates like that, but it doesn't have the extended section off the back of the transom for the jet like the Southwinds do, so I'm pretty sure that it isn't a Southwind. What are some other brands besides Southwind have used that setup?

Just trying to learn some stuff.

Thanks

Fair enough. I didn't think to snap a photo of it, but I will the next time I'm in town. It's a practical certainty that it will still be there.