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Old 19 September 2008, 11:48   #1
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Country: USA
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Make: Nautica Widebody 22
Length: 6m +
Engine: Yamaha 225 4 stroke
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Prop selection

My zodiac hurricane 630 with twin 4 stroke honda 75 hp (carbed) has a towing arch on the back. The props on the rib right now provide plenty of power when you are towing somethin like ten 22' sailboats, but when you are trying to get the boat up on a plane it just doesn't have a lot of punch and I get a ton of cavitation during a hole shot or when I try and tow a water skiier. I have to basically have the engines full trimmed down to get the boat up on its plane. I am thinking of adding a set of smart tabs to get the RIB up on a plane faster, but my guess is the props I have aren't the right size or pitch. Any thoughts?
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Old 20 September 2008, 15:13   #2
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Might try a 4 blade prop (if you don't have them already.) Should give you better bite and hole shot at the expense of a tad of top end speed.

Tabs *may* help, but probably won't do much for the initial ventilation you're seeing.

Perhaps some hydrofoil thingies? They're supposed to help isolate the surface from the props.

Luck;

jky
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