Thanks @Ryan-Yates that is helpful. Unfortunately I'm not entirely sure how I'd use that in the physics calculations. What I envision for figuring out the lift generated by the hydroplane tunnel/air trap would be to setup a grid of points at an angle. I can then sample the water at the center of each square to find the height above the water. From there I'm not sure what the equation is to figure out the lift force exerted by the air pressure. I'm thinking it may be similar to ground effects.
Thanks for registering! Unfortunately, the U-9 Delta/RealTrac has already been registered by another user. You may use the U-9 Jones Racing boat if you wish, or any other boat that isn't already registered.
Note: This is an update. There was a small yellow and black logo on the rear uprights that I couldn't identify from the pics if the boats that I had at the time. I was able to get a close-up pic of the logo last summer and just now added the logo to our versions the boats.
I'm also working on a new custom boat for myself, so the U-65 Newegg boat can be removed.