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  1. #1
    Seaman
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    Default wings on your outboards????

    What is the correct name for those wings that people bolt to the cavitation plate and does it really help a tired outboard get up on plane?

    cheers

  2. #2
    Lieutenant Commander arks's Avatar
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    Default Re: wings on your outboards????

    The generic term is hydrofoil.
    "Winter Dream"
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  3. #3
    Seaman
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    Default Why do people put hydrofoils on their outboards????

    no subject

  4. #4
    Supreme Mariner
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    Default Re: Why do people put hydrofoils on there outboards????

    Good marketing.

  5. #5
    Supreme Mariner
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    Default Re: wings on your outboards????

    They will help to lift the boat when over-propped or under-powered. - They also provide substantial drag.

  6. #6
    Moderator ezmobee's Avatar
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    Default Re: wings on your outboards????

    Two threads, same subject. I merged them.
    1976 18' Starcraft SuperSport 90HP Evinrude
    Restoration thread http://forums.iboats.com/boat-restoration-building-hull-repair/18-starcraft-supersport-restoration-357767.html
    1966 16' Starcraft Jupiter 85HP Johnson
    Restoration thread http://forums.iboats.com/starcraft-boats/ezmobees-1966-jupiter-338633.html sold

  7. #7
    Petty Officer 1st Class
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    Default Re: wings on your outboards????

    to cover up a broken anti-cavitation plate

  8. #8
    Vice Admiral bktheking's Avatar
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    Default Re: wings on your outboards????

    Mudlake has posted before, I think its legit.
    Signature- If you have fuel and spark- Have you checked compression?

  9. #9
    Moderator JB's Avatar
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    Default Re: wings on your outboards????

    When properly rigged, a hydrofoil, attached to the anti-ventilation plate.

    Lowers planing speed, regardless of prop or power.

    All of the negative myths about hydrofoils are supported by examples of being badly rigged.

  10. #10
    Supreme Mariner
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    Default Re: wings on your outboards????

    Quote Originally Posted by JB View Post
    When properly rigged, a hydrofoil, attached to the anti-ventilation plate.

    Lowers planing speed, regardless of prop or power.

    All of the negative myths about hydrofoils are supported by examples of being badly rigged.
    And most, if not all, of the marketing is supported by a paucity of independent, empirical data.

  11. #11
    Supreme Mariner Silvertip's Avatar
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    Default Re: wings on your outboards????

    These things have been discussed to death in these forums. Those who favor them amount to about 1% of those who have actually used them. Look at it this way, if they provided any significant benefit the manufacturers would have designed the AV plate that way.

  12. #12
    Seaman
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    Default Re: wings on your outboards????

    Quote Originally Posted by JB View Post
    When properly rigged, a hydrofoil, attached to the anti-ventilation plate.

    Lowers planing speed, regardless of prop or power.

    All of the negative myths about hydrofoils are supported by examples of being badly rigged.
    this is what I really wanted to here.
    Never had big enough motor to put one on and didn't know if they worked.

    thanks

  13. #13
    Petty Officer 1st Class
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    Default Re: wings on your outboards????

    Bad news.

    1)I am a firm believer that if there was a really good reason for it the engineers would have built it into it. Especially after all these years and different manufacturers.

    2)Bushing and bearing killers. 2 friends of mine had the same outdrive, same year and almost identical hours. Only difference, 1 had a hydrofoil and his pivot bushing/bearings went bad at about 200hrs.

    They do help keep the bow down. If you do a lot of skiing with a boat not purposed for skiing it may be something you want to consider. If not, Id skip it.
    Current
    1988 Fisher SV-18GT Bass Boat
    * 1988 Evinrude 90hp VRO
    1982 DuraNautic 14' Offshore
    1983 12' Lowe row boat
    Various Antique Outboards

    Past
    Various Antique Outboards
    1996 Larson 226 LXI bowrider
    * 5.7 FI Volvo Penta with SX drive
    1987 Chapparal 187 bowrider
    * 5.0 Mercuriser with Alpha 1 drive

  14. #14
    Petty Officer 3rd Class
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    Default Re: wings on your outboards????

    I put a home made set on a 9.9 merc I have because I was running it on a boat with a 21" transom and the motor was a short shaft. I had only the one motor then and it was not very deep in the water. At a slow creep it was fine but once it got moving it would suck air. With the rig on the motor it would keep more water on the prop. It didn't take the place of a long shaft motor but I was able to use the boat.

  15. #15
    Admiral
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    Default Re: wings on your outboards????

    So that entire subject doesn't need to be typed out again here's a link to a recent thread on the same topic. In your application it may help to get you on plane if used incorrectly, but its not what you need.

    http://forums.iboats.com/showthread....highlight=foil

  16. #16
    Admiral
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    Default Re: wings on your outboards????

    Quote Originally Posted by Silvertip View Post
    These things have been discussed to death in these forums. Those who favor them amount to about 1% of those who have actually used them. Look at it this way, if they provided any significant benefit the manufacturers would have designed the AV plate that way.
    You're correct, because only about 1% of the people have used them for what they can actually do and then set it up correctly to possibly get the desired results.

  17. #17
    Cadet
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    Default Re: wings on your outboards????

    i put one on my boat. 14" tri-hull with a 50hp. the boat has better top end, planes faster and turns faster.

  18. #18
    Chief Petty Officer ddrieck's Avatar
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    Default Re: wings on your outboards????

    Wings are for airplanes and birds....

    Tabs are for boats...

    nuff said
    Regards,

    ''Fish Me Gone''



    Democracy will cease to exist when you take away from those who are willing to work and give it to those who are not......Thomas Jefferson





    Find out how you can help prevent the spread of Zebra mussels.
    http://wgfd.wyo.gov/web2011/fishing-1000206.aspx

  19. #19
    Seaman Apprentice Chris's CVX16's Avatar
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    Default Re: wings on your outboards????

    I've done tests on my boat. I can tell you I have no speed loss what so ever. I have better control. I plane quicker and stay up at a lower speed. I can turn much harder. And with my SE Sport 300 I can also get away with a lot more trim when getting up on plane (less wear/tear on my trim motor)

    Proper setup is key.

    Mine came with my motor so I didn't purposely go out and get one.

    My little 100HP V4 is getting my boat up into the mid 50's with the hydrofoil. I am going to take it off when I install my new jackplate though. At least in the testing phase.
    Last edited by Chris's CVX16; February 25th, 2010 at 04:16 PM. Reason: forgot something

  20. #20
    Supreme Mariner
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    Default Re: wings on your outboards????

    on my 19 ft thunderbird with an 85 120 jonnyrude they worked well.
    its dangerous on my 18 hydrasports fish n ski with a 175 E-TEC. makes the back of the boat hop out of control on turns so I took it back off.
    so do they work? some applications.
    only testing carefully can tell.
    just be CAREFUL while testing.

  21. #21
    Chief Petty Officer
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    Default Re: wings on your outboards????

    If there were one manufacturer of outboards, at one hp.....and one style/make of boat all set up the same exact way without T&T you could say without a doubt "that product works, or does not work". But, with sooooo many variations of rigs and motors it's impossible. The foils may work wonders with some boats and work like crap with others. The only way to correct a problem is with trial and error. No doubt some of the same theories that work in avionics work in marine applications, due to lift and tilt by flow. Which is why some planes need large wings, and some need small wings. Some boats may need a little more cavitation plate, and some don't. Outboards are designed to run on a specific platform for that model, hp, and transom height. Then joe blow throws it something else and is unhappy with the performance, puts on some foils and the angels sing...runs like a champ. Someone else tries it on another rig and it runs worse because the motor needs less motor or lift. One thing though....Mercury says "use of Hydrofoils on some smaller v-bottom boats may cause the motor to dig in a turn, therefore ejecting the passangers".

  22. #22
    Petty Officer 1st Class ClassyGlassy's Avatar
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    Default Re: wings on your outboards????

    I like a controversial thread

    I have a Stingray installed on my '73 Evinrude 65hp and it planes my '72 Invader Trihull much quicker, runs at a higher speed, and turns easier at the higher speeds.

    But opinions are like other things everyone has......they all stink worse when it's not yours......

    http://www.marine-dynamics.com/index.html

  23. #23
    Admiral
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    Default Re: wings on your outboards????

    Quote Originally Posted by will941s View Post
    If there were one manufacturer of outboards, at one hp.....and one style/make of boat all set up the same exact way without T&T you could say without a doubt "that product works, or does not work". But, with sooooo many variations of rigs and motors it's impossible. The foils may work wonders with some boats and work like crap with others. The only way to correct a problem is with trial and error. No doubt some of the same theories that work in avionics work in marine applications, due to lift and tilt by flow. Which is why some planes need large wings, and some need small wings. Some boats may need a little more cavitation plate, and some don't. Outboards are designed to run on a specific platform for that model, hp, and transom height. Then joe blow throws it something else and is unhappy with the performance, puts on some foils and the angels sing...runs like a champ. Someone else tries it on another rig and it runs worse because the motor needs less motor or lift. One thing though....Mercury says "use of Hydrofoils on some smaller v-bottom boats may cause the motor to dig in a turn, therefore ejecting the passangers".

    You're so very correct, the only part that people must understand is sort of about what you mentioned on avionics and what Merc says about turning. If these things come into play (hydrodynamics, bad handling) its because the setup is most likely wrong, when used correctly the foil is not in the water affecting handling, nor will any wing (foil) effect take place. And again only a few boat and motor combinations will benefit from using one.

  24. #24
    Petty Officer 1st Class ClassyGlassy's Avatar
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    Default Re: wings on your outboards????

    I don't agree that only a "few" will benefit from a hydrofoil!

    read this: http://www.marine-dynamics.com/how.html

  25. #25
    Admiral
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    Default Re: wings on your outboards????

    Quote Originally Posted by Tubtoy View Post
    I don't agree that only a "few" will benefit from a hydrofoil!

    read this: http://www.marine-dynamics.com/how.html
    If you read the related thread I linked you'll see what they can do to help.

    Most of what is listed as a benefit in the advertising for this type of product would be better accomplished by tabs. Plus most of what the owners want to fix is better done with tabs, but almost every situation is different and needs to evaluated independently.

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