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Old 17 September 2006, 14:49   #1
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Advice please

Thinking of buying some hydrofoils for my rib as I get cavitation easily on tight turns. Can anyone recommend which type to go for? Anyone got any experience of these things, good or bad?
Narrowed it down to the following 3 types:
pic 1: doel fin
pic 2: whale tail
pic 3: SE300 turbo
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Old 17 September 2006, 14:58   #2
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My previous Rib was a Flatacraft Force 4 that I dropped a 55HP Suzuki triple on the back of.

First time out it was all over the place, as I think little or none of the boat was in the water at full chat.

I fitted a set of Doel fins which transformed it.

Not your issue I know, but still recommended.

Nasher
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Old 17 September 2006, 15:27   #3
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Are there any fins that just clamp on as apposed to bolted on. I'd hate to have to drill holes in my beloved outboard.
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Old 17 September 2006, 16:15   #4
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Holes ...

Andy

It might be worth checking your outboard but on both my mariner and yammie outboards, the holes were already there - presumably in the casting at the manufacturer. My only comment is that whilst my set of fins claimed to fit my yammie in fact part of the plastic just fouled on the trim adjuster/anode tab. However this was easily solved by taking a hacksaw to the plastic of the fins and in 5 mins all was fixed.

Regards - Andrew
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Old 17 September 2006, 16:31   #5
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Have you tried trimming down on tight turns?
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Old 17 September 2006, 17:20   #6
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Quote:
Originally Posted by Limey Linda
Have you tried trimming down on tight turns?
yes, motor trimmed fully in.
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Old 18 September 2006, 15:50   #7
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I used Doel fins on an hard boat I had years ago, but that was to achieve stern lift when a bit loaded up. They worked very well.

Have you checked the actual engine height? When I bought my last Humber, she had been set up for all out speed ie with the engine set high up. the downside of this was cavitation in turns, and poor response to trim.
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Old 19 September 2006, 03:21   #8
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The cavitation plate sits about 1/2-1" below the keel and is sat on the transom as low as it will go.
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Old 19 September 2006, 03:57   #9
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Hey Jizm, Are Smurf and Arf still playing? and what is Sprocket up to now?
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Old 19 September 2006, 04:14   #10
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Jizm, I have a set kicking around my garage somewhere if you want to try a set first. Can't remember the name but think they are are Doel Fin.

Regards

Pete
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