Props: 3 VS 4 Blades

[mkuehnl]

I have been in a discussion with a number of people who feel that on an inboard type ski boat, a 4 bladed prop will out perform (handling less prop wash etc) a 3 bladed prop. Has anyone had any pratical or hands on experience in determining the facts around this issue? I would like to find out difinitively if the theory holds water or not (sorry about the pun).

 

[Spidybot]

Re: Props: 3 VS 4 Blades

In general: More blades makes a smoother thrust. Causes less vibration and has less slip. Other benefits are aimed at the outboard/outdrive market as they're supposed to solve cavitation, lack of trimability etc.<br /><br />Your prop runs under the boat and doesn't have those problems.<br /><br />Prop design also is about blade shape, blade area, blade tip speed and more.<br /><br />I'd suggest you look at http://www.miwheel.com/MIWheel/propit/main.htm