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  1. R

    4 blade prop

    Has anybody tried a 4 blade prop ? Any advanrage ? Any increased speed ? RPM change ? I'm running a Ford Lehman 120 in a 30 ft. Island Gypsy. 1700RPM gives about 7 knots.
  2. R

    Prop question

    Hi All, I just purchased a 30 ft. Island Gypsy , and have a prop question. It's powered by a standard Ford Lehman 120. Has anyone figured out the optimum prop size and pitch. Former owner ran at about 1650 rpms. I'm not concerned about fuel use, but more about cruising speed. Thanks for...
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