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Old 01-18-2016, 09:49 PM   #12
Wxx3
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City: New York, NY
Country: USA
Vessel Name: Dauntless
Vessel Model: Kadey Krogen 42 - 148
Join Date: Jan 2013
Posts: 2,694
Quote:
Originally Posted by stubones99 View Post
If fewer blades is better, why do the new super efficient container ships use 5-6 blade props? Is it because their RPM's are down in the 450-500 range and need that many blades to take the HP?
Simple. People like simple answers to complex problems.

Clearly, it's a function of the boat, engine, and power and torque of the engine at the anticipated cruising speed.

The previous owner put a four bladed prop on Dauntless. He ran at 1800 rpm, I almost never do.

I may check out the three bladed prop i have.
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