Hi all,
I’m currently scratch building my second rc boat using fiberglassed balsa wood. I’ve chosen my electronics: 2100kv motor, 120a marine esc, and 4s lipo. My only remaining issue is that I’m completely lost when choosing props. I understand the basic effects of pitch and diameter from model airplanes, but I don’t know any benchmark prop specs for my setup. If I can find out a benchmark prop, I’ll buy a whole bunch with similar specs and test which one works best. So do you guys have any ideas? I’m hoping for some decent speed (40mph ish or maybe more). Any guidance asap would be massively appreciated!

P.S: the boat is about 600mm long, here’s a pic of the hull in it’s current state (I’m fiberglassing it at the end)