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I'm pondering replacing my prop during the next haul out to get a bit more speed when motoring:
The boat: North star 26 (26ft, disp 4600)
The motor: Yanmar 2GM20(F) 16HP at 3200 RPM
The prop: 2 blades, not sure of the size/pitch
Hull speed is 6.0something kts by the equation and I've had her a little over 6 under sail.
When motoring at 3200RPM in calm conditions I get to about 5-5.2 kts. I'd like to make 6 kts in calm conditions without pushing much above 3000.
My ignorance on this topic is nearly absolute, so I greatly appreciate the thoughts and advice of those who know.
2 blades, different pitch, three blades?
The boat: North star 26 (26ft, disp 4600)
The motor: Yanmar 2GM20(F) 16HP at 3200 RPM
The prop: 2 blades, not sure of the size/pitch
Hull speed is 6.0something kts by the equation and I've had her a little over 6 under sail.
When motoring at 3200RPM in calm conditions I get to about 5-5.2 kts. I'd like to make 6 kts in calm conditions without pushing much above 3000.
My ignorance on this topic is nearly absolute, so I greatly appreciate the thoughts and advice of those who know.
2 blades, different pitch, three blades?