Hi all,
I wanted to get a peer-review on a few themes I am picking up on in the propeller efficiency area, as I am starting some research to determine if my propeller setup is optimal efficiency, for a displacement hull, inboard electric drive that runs 6kts tops.
Larger, slower turning propellers are more efficient than faster smaller propellers to do the same amount of work.
Kort or Rice nozzle designs can help improve efficiency for slow moving vessels, assuming one gets an optimized propeller shape for a nozzle (highly swept with blade tips that contour to the diameter of the nozzle).
Less blades improves efficiency (I can't tell if this is directed at sailboats only, meaning they offer reduced drag while not spinning, or if this is in general), but at a cost of increased vibration. Three blades seems to be the best balance between vibration and efficiency.
Thanks in advance for dispelling any misconceptions I have. I'm new to boating and learning lots.
Ben
Posted by: benjatelcom@gmail.com
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