So ... are there any?
I know, in general, what to expect if I go to a prop with a greater (or lesser) diameter, or with a greater (or lesser) pitch. But what happens when I go from 2 blades to 3 blades or more?
If I swap, say, a 10x6 2-blade prop for a 10x6 3-blade prop what's the general, basic result? More thrust? Less thrust? More drag? No appreciable difference?
What about a 4-bladed prop?