Quote:
FF wrote:
Many sailboats use 2 blades with great efficiency , as they usually can carry the diameter .
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I have always believed the opposite.* The typical auxiliary sailboat has a
small, two-bladed propeller.* When not using the engine under sail, the two-bladed propeller can be aligned with the keel to minimize drag.* We always checked/adjusted alignment when sailing and particularly when racing.* A three-bladed propeller would have been better for motoring, but a three-bladed (non-colllapsible) propeller would create a lot of drag while sailing.
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