Planing Hull Transom Breakaway Angle
I'm looking at the mounting height for an outboard that is set back from the transom on a box, the cavitation plate needs to be just below the surface of the water as it would be if the outboard was mounted on the transom. Is there a formula for working out the the height adjustment required.
The theory as I see it is that when the craft is planing the water breaks away from the transom cleanly, which is lower than the dynamic waterline. This lower water will then of course raise up the further aft from the boat you go.
This will be a function of speed, deadrise and distance aft of the transom. Potentially running draft could also play a part.
Any help would be greatly appreciated.