4 Blade vs 3 blade props

Now that you mention it, the original comparison was really 6 blades vs 4 blades Wink Laughing

Sandy, did you mean 8 vs. 6? Guess when we are talking twins, those would be the numbers. Good catch.
 
Sandy, did you mean 8 vs. 6?
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Good catch on the "good catch"......yep, 6 vs 8 blades. :lol: :lol:

P.S. However, someone did mention that they get plenty of purchase with 3 bladed props with twin engines (i.e., 6 blades); so my comment was really directed to those of us who have singles and are comparing 3 blades to 4 blades. I do find 4 blades gives me better purchase vs 3 blades on a single; so I guess I'm not surprised that someone with twins finds 6 blades (2x3) provide adequate purchase.
 
I can tell you without question that on the CD 22 cruiser twin 45s will plane a heavy load that a 90 hp single will not. I don't know why and have really never thought about it until now. I just assumed props since the boat in question with the 90 is ever so slightly faster than my boat. But now, I suspect it is because of the lift and added torque of the twin engine configuration. Of course there are a lot of variables in this, but at least it seems reasonable and makes me feel better :-)
 
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