Strip composite vers fiberglass one off ?

Discussion in 'Materials' started by frank smith, Dec 16, 2012.

  1. frank smith
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    frank smith Senior Member

    Has anyone done, or have ideas about the difference in cost and time between a composite and a fiberglass one off hull.

    I mean a wood strip composite and a fiberglass composite.

    Frank
     
  2. gonzo
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    gonzo Senior Member

    Are you asking the difference between wood and foam core composite?
     
  3. michael pierzga
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    michael pierzga Senior Member

    And you should indicate a size range.
     
  4. TeddyDiver
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    TeddyDiver Gollywobbler

    The mould..
     
  5. michael pierzga
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    michael pierzga Senior Member

  6. PAR
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    PAR Yacht Designer/Builder

    Strip planking is a broad method, which should be refined. I can think of about a dozen different types of strip planking build methods. All are tedious, in regard to planking little strips, some require considerable, additional laminate effort and cost, while others can have as little as no additional effort, other than fairing.

    Strip planking is used because you can use a lesser grade of planking stock, particularly if it's a cored, sandwich type of build, which saves costs. You can also build quite complex shapes, which isn't possible some other methods. If scantlings are preformed properly, it can also be fairly light weight and the novice can have and easy time laying strip after strip.

    One off 'glass builds, typically have higher materials costs, but can be faster builds, so you save on labor. Both one off 'glass and strip planking don't need elaborate molds, just a simple frame work and some stringers, so they're the same in this regard. Labor can rise dramatically with one off 'glass because of the fairing necessary. Lastly, the "goo factor" rises exponentially with a one off 'glass build, so if playing with goo isn't your idea of a good time, you might want to give another method a good look.
     
  7. frank smith
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    frank smith Senior Member

    I am thinking of a boat about 25' heavy disp. simple design outboard rudder .
    Weight would not be great issue, so no foam core. wood inn a wood composite is still a core and prone to water saturation. Mold for fiberglass should be no big deal.

    Would a resin spray out fit be worth it? or would 2 guys wetting out fiber glass sheets as we go be just as efective.

    I hve done body work and worked as pro drywall finisher so the I dont see fairing as a big deal.

    All that being said, the simplisity of a straight strip plank build might be the way to go.

    Frank
     

  8. Steve W
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    Steve W Senior Member

    If by a straight strip plank build you mean over frames without structural glass in or out it is a fine way to build, it allows for easy laying of a plank or two whenever you have a couple of free hours working on your own. If you dont want to do a cored glass boat and your design has the displacement to support a solid glass build you could try C flex planking if its still available, i built a Fred Bingham Allegra hull for a customer to fit out himself nearly 30 yrs ago and quite liked the method.

    Steve.
     
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