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Hydrofoils good or bad?

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  • Hydrofoils good or bad?

    i have a 16ft boat with a hydrofoil on it and im curious if it could make the boat perform worse?


  • #2
    Re: Hydrofoils good or bad?

    Some people are happy with them, but many have high-speed handling issues. Many threads on subject. Look into smart tabs as a very good replacement for the foil.

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    • #3
      Re: Hydrofoils good or bad?

      i have 2 set in my shed, waiting to give them to someone i don't like.

      they put the stress of lifting the stern in the wrong place, increasing stress on the transom of the boat.
      FLORIDA GATORS
      TEBOW Country



      Please, NO PM's (Private Messages) regarding boat/engine problems. they will not be answered.
      That is what these forums are for. Post your questions, in the appropriate Forum.

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      • #4
        Re: Hydrofoils good or bad?

        You are in an easy place to find out -- you already have the holes in your cavitation plate. Just on bolt it and run a comparison test and find out.

        I like mine a lot.

        But I have to admit, these smart tabs people's constant drum beat has me considering them as a future project some day. They are like the Chinese water torture I used to put on my parents when I wanted something:

        smart tabs

        drip

        tabs

        drip

        tabs

        drip

        tabs

        repeat a thousand times
        Fun boat: 2004 Stingray 190LX, Merc 4.3 Carb, Alpha I, SE Sport 300 Hydrofoil, Hi 5
        Ski boat: 1985 Ski Nautique 2001, Perfect Pass

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        • #5
          Re: Hydrofoils good or bad?

          willy---tabs----willy----tabs----willy----TABS!!!!!

          http://www.iboats.com/Marine_Store/d...h_type.keyword
          FLORIDA GATORS
          TEBOW Country



          Please, NO PM's (Private Messages) regarding boat/engine problems. they will not be answered.
          That is what these forums are for. Post your questions, in the appropriate Forum.

          Comment



          • #6
            Re: Hydrofoils good or bad?

            I had one on my 19' bow rider and I eventually took it off and I think it handles a lot better. The initial bow rise is more, by like two seconds, but it does better in rougher water now and I think I have a better top end speed.

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            • #7
              Re: Hydrofoils good or bad?

              This will also sound like an echo -- fins are a tool. Use the tool wrong and you'll have bad results. Using the tool correctly will result in good things. The fin all by itself probably won't do much and will probably hurt performance. The fin is a tool. It allows you to do other things to increase efficiency. It won't do it magically all by itself. Regardless of what the ad says.

              We used our own design fin on outboard drag boats and had great results. We never found them to create any more stress or drag. We do know that all the boats we had them on were quicker, faster and handled better. Even if the boat had tabs in addition to the fin.

              The fin we used is probably much larger than what you're used to seeing. We had a lot of square inches. The smaller ones today are OK but only if they're used properly.

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              • #8
                Re: Hydrofoils good or bad?

                My vote is Smart Tabs, I have them and like them, had a foil on another boat, never really liked it.
                http://www.facebook.com/iloveboating


                http://myboat.wikispaces.com/
                2004 Sea Ray 185 Sport, 4.3L,190, Alpha
                1994 GMC 4X4 1500, 5.7L

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                • #9
                  Re: Hydrofoils good or bad?

                  That's the first time I have seen Dhadley's comment which has me thinking some . . . With that said my signature used to be: Friends don't let friends use hydrofoils.

                  Oh and I always add (and must or John might have a heart attack) that Smart Tabs are great, but don't forget that there are also helm adjustable tabs for those of us who like to fiddle with stuff
                  Torque gets you there. Horsepower gets you there in time for dinner.

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                  • #10
                    Re: Hydrofoils good or bad?

                    Hi Dale;

                    Glad you got in on this.

                    To Charley;

                    You will not hear me say much good about hydrofoils as a simple "slap it on and go" product and that is not because we make Smart Tabs. As Dale said they are or should be used as a tool to accomplish specific results in combination with other items, adjustments etc. Hydrofoil technology is valid and proven, but to gain the results you are looking for, you need to design it into the overall picture. If not you will get improvements in one area and deterioration in another. Why? Because the devise is fixed, rigid, non adjustable. When Dale raced the combination of the hydrofoil, the prop, the engine height etc. where all part of the whole picture.

                    For the everyday boater who is looking for overall improvements in planing, ride, handling, speed, and fuel economy trim tabs are a better solution. Why?
                    Because they are adjustable. They change the shape of the hull as required, and the hull dictates the overall performance even more than the power plant.

                    If you only want to help get the boat up on plain, the hydrofoil will be of some assistance, but you will compromise other areas of performance.

                    Dale is absolutely correct, hydrofoils are a tool that will help you achieve specific results when used in conjunction with other items.
                    Get SX Smart Tabs cosmetic blems for an extra $20 off (only $99.95) exclusively at iboats.com
                    link: http://www.iboats.com/Nauticus_SX_Sm...2485--dz.54646

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                    • #11
                      Re: Hydrofoils good or bad?

                      John, i just save this for futher post. hope i can quote you.
                      FLORIDA GATORS
                      TEBOW Country



                      Please, NO PM's (Private Messages) regarding boat/engine problems. they will not be answered.
                      That is what these forums are for. Post your questions, in the appropriate Forum.

                      Comment



                      • #12
                        Re: Hydrofoils good or bad?

                        Well, after taking the Doel fin off my 19' outboard ski boat that it came with, due to the general advice here against them, I noticed my boat leans quite a bit more in the turns, almost to the gunwales, and when fully trimmed out, it has a tendency to lift completely out of the water, & pounds more, running dead ahead at higher speeds in a chop, or rougher water, and although the hull design is made to get up on plane quick, it is quicker still with the fin. Yes, I think it's a bit faster at top end, but not that much that it matters, considering the benefits. I'm actually thinking of putting the fin back on, because I actually like what it does.

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                        • #13
                          Re: Hydrofoils good or bad?

                          WIth my boat when i first accelerate my nose comes up quite a bit. I was hoping that a cheaper hydrofoil would solve the problem. I get on plane fast enough so really dont need it for that, i just want to keep the nose down and stablize the boat a little. Is the cheaper hydrofoil the way to go or should i get the more expensive trim tabs. Thanks
                          1983 Bayliner Capri 1600
                          1983 FORCE 85 HP outboard

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                          • #14
                            Re: Hydrofoils good or bad?

                            How about Permatrim Hydrofoils? I have heard good reviews about them

                            Marc..

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                            • #15
                              Sign up today
                              Re: Hydrofoils good or bad?

                              Hey John! Good to "see" you again.......

                              Just remember that each boat & motor combo is or at least has the potiental to be different. I really like John's tabs because they constantly adjust (by pressure) automatically.

                              As for tools, remember not all tools are created equal. Not all tools do the same job. A hammer and a saw are needed to build a house but they do very different things and in the end they allow you to accomplish a specific thing.

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