propeller

propeller

grabcad

The distance across a circle formed by blade tips is known as its diameter. Mercury Marine's manual, Everything You Need to Know About Propellers, explains that the diameter depends on the boat's speed and the propeller's rpm and power. For slower boats, the diameter usually increases while it decreases for faster boats. When other factors are constant, an increase in power leads to a larger diameter, whereas a decrease in rpm results in a larger diameter as well.

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