Advice, Stitch and Glue construction - novice

Discussion in 'Boatbuilding' started by cpodest, Jun 24, 2014.

  1. rwatson
    Joined: Aug 2007
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    Location: Tasmania,Australia

    rwatson Senior Member

    I was going on his description of "just cut 30 or 40 cm and replace it? ", indicating side panels that are will become short.

    For a small boat like that, one bigger 'block' on the inside, a small infill block to close up the gap, epoxy putty and glass cloth on the outside would be structurally fine.

    My experience is that larger areas of epoxy 'putty', especially if left on hot sun, tend to sag or imprint over time.
     
  2. PAR
    Joined: Nov 2003
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    Location: Eustis, FL

    PAR Yacht Designer/Builder

    Yep, Steve has it. I've done enough flat bottom skiffs that this set of shapes is easily recognized. They can be deceiving at first glance and do seem counter intuitive.

    Scarfs are easy, but they do take some practice. If you have to make a repair and wish to do it from only one side, I use a modified Payson butt joint. Instead of grinding out each side of the joint and laying fabric and goo in it, I grind out one side of the joint, basically making two opposing scarfs, that butt at the feather edge. The I cut a matching piece to fit or just fill with fabric and goo. This leaves you with a clean seam on one side (good for bright applications) and a smooth, seamless under paint joint on the other. On plywood, I grind down until I've hit the last veneer layer, when making the two tapered edges. This leave enough meat on the outside to do some fairing if necessary.
     
  3. cpodest
    Joined: Mar 2014
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    cpodest The Beginner

    Thanks a lot guys!
     
  4. cpodest
    Joined: Mar 2014
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    Location: Ilhabela - Brasil

    cpodest The Beginner

    some pics

    Dear Guys,

    Here are some pics... 1 to 6..

    So, any suggestion is welcomed.

    Best regards,
    Carlos
     

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  5. bregalad
    Joined: Dec 2010
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    Location: Georgia

    bregalad Senior Member

    Add butt block inside.
    Carefully remove butt block outside.
    Lots worse mistakes you could have made.
     
  6. lewisboats
    Joined: Oct 2002
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    Location: Iowa

    lewisboats Obsessed Member

    I agree... You could chisel the old one mostly off then finish with a grinder/flap wheel or an RO sander and 60 or 80 grit. Minor oops at the most.
     

  7. cpodest
    Joined: Mar 2014
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    Location: Ilhabela - Brasil

    cpodest The Beginner

    Closed ¡

    Dear Guys,

    Finally I have fixed the mess¡



    Probably last comments, about were a better solution; just put a buttjoint inside and take out the joint outside. I tried to take out the outside joint, manually, because I have just some electrical tools, and was imposible¡ So I decided to cut out the messed part, and replace for a new one using paysons (modified) for the joints.

    Take a look at the pics for more details.

    Thanks a lotfor your valuable help¡
     

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