I have a question that some of you aeronautical engineers or experienced pilots might be able to answer for me. My situation is as follows. I am building a twin engine seamaster and my props ended up being closer to the water than I wanted. I am turning 9x4 props with my magnum 25 engines. I know that there is a low pressure area in front of the props that will want to pick up water and “suck it into this area. So the question is this, will a large diameter lower pitch prop create a larger low pressure area than a shorter higher pitch prop at static or near static speeds. For example if I go with a 8x 7 prop instead of a 9x4, as I throttle up to full throttle for takeoff will there be less of a low pressure area in front of the prop with the higher pitched prop when I am just starting to speed up from a stop. I realize that the 8” will be ½” farther from the water and am thinking that the smaller prop disc and higher pitch will not create as much of a suction until it gets up to speed at which point the fuse will be up on step and farther from the water. Is there any science behind this or is it just a try it an see kind of thing.