PBY-5A Catalina ?
I hate to burst your bubble or discourge you from building a cool plane, but I have yet to see a model PBY perform well in the water.
The most comon problem I've seen is the small/scale tip floats not having the boayincy or surface area and angle of attack to keep the wing tips from getting to low on taxing or digging in the water on take off..
I'd keep this in mind if you decide to build one, and make sure the tip floats are big enough and angled enough to keep the tips out of the water. even if they aren't at the scale size or angle
Good luck