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Old 06-15-2008
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Even with such distance between the prop and keel, vertical is probably better than horizontal. Things like entrained flow and turbulence along the hull surface may mean that having a blade closer to the hull doesn't slow you down as much as having both blades sticking out horizontally into relatively less turbulent water. What with heeling and wave motion, though, it might be worth testing with the blades in both positions to be sure. You'd need a fairly finely calibrated speedo to tell the difference, though.
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