help with fiberglass wing on fishing kayak

Discussion in 'Stability' started by Itchy One, Sep 3, 2020.

  1. Itchy One
    Joined: Sep 2020
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    Location: calif.

    Itchy One Junior Member

    thanks. I was thinking 2 strips of 1/4" marine ply 2 " in from edge as fiberglass won't roll over a 90 degree bend. Shape and fill with 2" ridgid urathane insulation, after you get the foil off you sand at least 3/16" off before it's smooth.
    There 2 gussets with a layer of fiberglass and epoxy resin at the center joint
     
  2. Itchy One
    Joined: Sep 2020
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    Location: calif.

    Itchy One Junior Member

    Sorry I missed the sandwich part. I have some 1" foam I had concidered running below the plywood but peeling the backing off it even with a heat gun takes forever, by the time it's smooth enough to use it's at most 9/16" See the battery box after 6 layers of cloth. I can't seem to find a honey comb core this side of the rockies, lots in stock on east coast from Main to Florida. Shipping here is risky and expensive, more than material. I've been looking for weeks. So I joined this forum for help on the wing.
     
    Last edited: Sep 4, 2020
  3. Blueknarr
    Joined: Aug 2017
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    Blueknarr Senior Member

    I would not add any foam.
    Add your quarter ply top and bottom
    Round off or fillits
    Glass
     
  4. Itchy One
    Joined: Sep 2020
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    Location: calif.

    Itchy One Junior Member

    Thanks BlueKnarr, hadn't thought of that. Do you think 2" thick would keep it from folding? My wing idea is kinda like the old Triak sailing trimaran kayak. All I know about fiberglass is it's itchy messey and anymore expensive. But it's strong and light. Any idea how I could arch it a bit without a ton of framing? If it were a structure it would be easy, weight isn't a problem. Boat will be car topped other parts fit inside 4WD SUV.
     
  5. upchurchmr
    Joined: Feb 2011
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    Location: Ft. Worth, Tx, USA

    upchurchmr Senior Member

    Add foam to the wing, shape it, then glass it.
    The ply in the middle will do nothing for strength, just act as a base to put the foam on.
    Use Styrofoam insulation (1" thick on each side of the ply)
    Add solid wood anywhere you are going to put a bolt or all thread.

    I worry a lot about this thing not floating level with everything on it, or not at all with batteries and a trolling motor.

    You would be better off with a simple catamaran.
    Something a little better than this.

    [​IMG]
     
  6. Blueknarr
    Joined: Aug 2017
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    Blueknarr Senior Member

    Assuming you don't desire an extreme arch.

    Slow setting glue
    Glue strips opposite each other on main base
    Screw together near central gusset
    Clamp central gusset to workbench.
    Lift wing tips and wedge in place (over flex because it will spring back slightly)
    Screw thru top strip into the bottom one using extra long screws while glue is liquid
    After glue sets, replace screws with ones that don't protrude (from both sides)
    Ease edges and glass ONE SIDE AT A TIME! Unless you enjoy wallpapering a celling will one arm tied up
     
  7. Itchy One
    Joined: Sep 2020
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    Location: calif.

    Itchy One Junior Member

    I guess a drawing would help. I don't think flotation is a problem, from what I have seen people on youtube doing on their 100 + lb. fishing kayaks. Adjustable PVC supports with pool noodles for pontoons, notice not many real world tests.
    Outrigger draw 2.jpg
     
  8. Mr Efficiency
    Joined: Oct 2010
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    Mr Efficiency Senior Member

    I would not go to much trouble initially, try something make-shift and trial it first, if you like it, do a proper job for a permanent attachment.
     
  9. Itchy One
    Joined: Sep 2020
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    Location: calif.

    Itchy One Junior Member

    Blueknarr Thanks, I'm planning so far to have the outriggers in the water full time. The arch would be to help hold the load. kinda like a flat bed trailer for heavy loads. I haven't gotten to the outriggers yet, so I don't know how much weight they will hold. I can't see leaning my 210 lbs on some plastic adjustable fishing rod holder, and a 3ft. inflatable balloon like hobbie sells.
    If the chair boat thing seems funny look up fishing kayak videos on youtube
     
  10. Itchy One
    Joined: Sep 2020
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    Location: calif.

    Itchy One Junior Member

    I'm with you Trying for a stable wing, out riggers will mount 1/3 back from front to help keep them straight.
    to me this ain't pretty and it's $720
    720 dollar single outrigger kit 1x4.5 x 6 board.jpg
     
  11. Itchy One
    Joined: Sep 2020
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    Location: calif.

    Itchy One Junior Member

    this is a Triack . In the $6000 range. Triack.png
    Also where I got the wing idea. looks a bit squared off for me. Round is better with no flat edges, flat edges seem to create turbulance in air and water. Mine is a $20 rounded hull boat cheap and slipery. Eventually will have teardrop shaped outriggers.
     
  12. upchurchmr
    Joined: Feb 2011
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    upchurchmr Senior Member

    Turbulence?
    You are not going to be going fast enough to generate turbulence.
    You are making things hard for yourself.

    Why make rockets when you could just as easy make streamlined outriggers. Teardrop is not particularly great.
     

  13. Itchy One
    Joined: Sep 2020
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    Location: calif.

    Itchy One Junior Member

    Just for funtion, and like the chair pic, I could slap a board on with my 6" pvc Pipe. Slower and heavy, looks dumb. At5 mph trolling for 6-8 hours big lake needs to be smooth and efficeint. A nice look doesn't hurt either.
    Smooth out the engins and wala, my kayak, move the cockpit back of course. yes slow has turbulance over the course of a day 1 mph is still 20%. For now the wing is to test floatation of out riggers. The water that is open is 45 min. away across the hills and $10 to launch, I'd hate to fail in the 1st 10 min. This thing breaks down kayak on roof wing & out riggers inside a pathfinder.
    top down rocket.jpg
     
    Last edited: Sep 5, 2020
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