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Old 11-30-2009
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KeelHaulin KeelHaulin is offline
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Great writeup "poster formerly known as Halekai"! I think that is just the information I was looking for to convince me that if I go with the fixed blade CS prop; it is the right one for the job. Still can't decide between a fixed blade and a possibly new larger Martec for ~200 more; since my prop is offset from centerline of the boat I need all the drag reduction I can get. But the CS prop looks so nice for the reasons you stated about getting the proper pitch and it being an efficient blade design.

I'm afraid that the Martec might increase my shaft vibration problem; as I don't know for sure what the cause of it is. It could be cavitation and 2-blade prop vibration; or it could be alignment or engine bed vibration (fiberglass pan). I suspect that a standard Martec could worsen it; are the Elliptec props any lower in vibration than the older Martec prop design?
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