Type of plywood for carbon fiber cover

Discussion in 'Materials' started by Aylan, Nov 15, 2022.

  1. Aylan
    Joined: Nov 2022
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    Aylan Junior Member

    Hello !

    This is my first time building a boat so I'm not very knowledgeable in this matter.

    I decided to build a wooden boat that I'll cover with a carbon fiber cloth. So my question is this, since the entire boat will later be covered with carbon fiber, is the type of plywood still important or not ?
    I was going for Okoume Plywood but someone told me that since it's going to be covered it doesn't matter which plywood I choose.

    Thank you all for sharing your time and opinions.
     
  2. fallguy
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    fallguy Senior Member

    Well, it comes down to goals. If you are spending on carbon; then okume is a sensible choice.
     
  3. Aylan
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    Aylan Junior Member

    Actually I'm not really spending on carbon since I already have it. My goal is to have a very durable, waterproof and light boat since it's going to be sailing for at least 2 months non-stop this summer. For the plywood I actually only have two choices, either regular plywood or okoume plywood (both have a thickness of 5 mm).
     
    revintage likes this.
  4. fallguy
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    fallguy Senior Member

    Light also means okume..
     
  5. jehardiman
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    jehardiman Senior Member

    Aylan, you know carbon really doesn't make engineering or financial sense when used over wood because of cost (a non-issue here) and durability compared to other possible choices. It only gets done for the "flash" factor; so make sure you finish it bright.
     
    Alan Cattelliot likes this.
  6. gonzo
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    gonzo Senior Member

    Have you ever worked with carbon fiber? It is pretty hard to wet properly. You will have either vacuum bag or infuse it. Otherwise, hand laid, it will likely be heavier than fiberglass.
     
  7. fallguy
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    fallguy Senior Member

    He has the carbon on hand.

    Carbon can be hand laid with due care. This means careful wetting of the substrate, followed by careful (even) application of the resin. He should be able to get a 1:1 ratio which is not as good as any vac, but suitable. Another way to reduce the resin content is to overlay (immediately) the carbon with super light woven like 1-4 oz which also offers a layer of abrasion. The woven acts like sponge as long as you don't add resin or much for it.

    So much depends on desired outcome which he has not really stated other than building a wood boat iirc.
     
    Last edited: Nov 17, 2022
  8. gonzo
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    gonzo Senior Member

    He also stated it is his first time and he is not very knowledgeable. Carbon fiber is a difficult to work material. Even if the carbon fiber is free, it may not be the cheapest solution.
    @Aylan. What does the boat designer specify for the boat construction materials?
     
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  9. jehardiman
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    jehardiman Senior Member

    Like any "free" boat! ;)
     
    Milehog likes this.
  10. Aylan
    Joined: Nov 2022
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    Aylan Junior Member

    Hello, thanks for your concern. Yes I have already worked with carbon fiber in other projects and I usually vacuum it.
     
  11. Aylan
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    Aylan Junior Member

    Hello, thank you for your help ! It is actually one of the requirements for this project, which is why I have to use it....
     
  12. Aylan
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    Aylan Junior Member

    Hello. Thank you for your advise ! Actually it will be used more like a protective cover for the boat than anything else. The carbon fiber is a requirement of the project so I don't really have a choice.
     
  13. Milehog
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    Milehog Clever Quip

    If you say so...
     

  14. fallguy
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    fallguy Senior Member

    cf is not really considered an abrasive cover...
     
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