prop basics a little help please

[grendelsniper]

ok, I tried a search but couldn't find anything. any insight on this would help everybody.

pitch vs diameter how does it affect rpm and boat performance?

anybody?

I know less pitch faster take offs and less mph what about 13.75"vs a 14.75" or 15" on dia.

 

[steelespike]

Re: prop basics a little help please

Diameter is a secondary consideration.Assuming the same pitch a 1" diameter change "might"
change rpm 100 or 200. Usually as pitch increases diameter decreases and viceversa.
Usually a 4 bld. will have slightly less diameter.