Join Date: Feb 2003
Location: New England USA
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Rep Power: 13
Prop Drag :folder vs Max
If you are concerned about drag under sail, the Martek 2-bladed folding prop is the best, bar none. They are worth maybe 1/10 kt over the feathering props. If all you are concerned about is getting in and out of your slip, go with the Martek.
If you are planning on cruising and using your engine for making time when necessary, go with the feathering props. They are way more efficient under power than the folding props. They act most like a fixed prop. A great help in making your fuel last longer while motoring.
I use the Martek. They are inexpensiive, and can be rebuilt. Mine has been rebuilt twice, over about 15 years. Ran about $300 each time, including labor to pull and install.