2 blade prop vs 3 blade prop

Dear All,

My Sail Drive is currently being serviced and they are suggesting that I should think about replacing the 3-bladed prop with a 2-bladed prop, as this it is more efficient. From reading up, it seems that they are indeed correct that the 2-bladed prop is more efficient. However, 3 blades seem to give better acceleration and would seem to be a bigger advantage for general manoeuvring and maintaining speed in a chop.

In my case, ease of manoeuvring is a significant consideration as we are in a very tight marina and I do not have a bow thruster! In any case the loss of efficiency seem so be minimal (up to 1/4 of a knt?).

Can anyone give me a good reason why I should consider switching to the 2-blades?

Many thanks

Suggest you look at a KIWI prop.  Three blades, feathering and adjustable.  Best price and service of any prop manufacturer.  You can order direct from KIWI in AU.

Hi,

I would spent the money to keep the propeller clean. Even a few barnacles destroy the specs of any propeller and especially the most efficient ones. Some diving equipment is a good investment.