flow

Hello everyone, I'm currently in engineering school and we have to do a boat all by ourselves (a small one of course) and my group came to the discussion about propeller. Where do we place it to optimize water flow rate ? Our boat is 600mm in length, 97mm in height and the transom (back of the...

My dinghy has a flat transom. It's vertical, too. What does the water flow look like behind such a transom at a modest speed like 3 mph? Does water in any way follow the boat like the still air you try to create behind a windbreak for a cyclist? Hope my question makes sense.