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Thread: Free skin-on-frame stand-up-paddleboard plans?

  1. #1
    Join Date
    Aug 2011
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    16

    Default Free skin-on-frame stand-up-paddleboard plans?

    Curious to hear if anyone has built a skin-on-frame stand up paddleboard without plans or using some free plans (which I haven't been able to find). I'm not opposed to paying for plans - just trying to survey my options.

    I've made a couple SOF kayaks, always without plans (steam-bent ribs, just sized the frame to my body traditional style) and wondering if I can get away with something similar. I'm not trying to make anything super fancy, just want to putter around my local ponds on calm days and have a place to tie my cooler when I go swimming. Also been doing too much fiberglass work lately and want to bust out the hand tools

    If no plans, any good resources (or personal opinions) for desigining a SUP? (i.e. how to choose length/width, rocker, deadrise, flare, etc)?

    My thought was (if I just freestyle it) to take a kayak-like approach, something along the lines of:
    1. Build rails and attach to transom/nose (a-la SOF kayak, this sets the shearline and flare)
    2. Put keelson and stringers in place temporarily, get them to have whatever deadrise and/or rocker I decide (maybe measured off of a "real" sup and approximated?)
    3. cut & insert plywood frames
    4. Figure out some fin arrangement - I have a spare longboard fin box and a big D-fin in the ole' basement-chandlery-rubbermaid-tub, so probably I'd figure out a way to use that (maybe embed into the keelson?)
    5. lash keelson/stringers/deck stringers (I assume just a flat deck?)
    6. strap a deck on top (piece of thin plywood? maybe thin plastic? whatever I find in the basement?)
    7. success!(?)


    Curious if to hear if anyone has attempted a plan-less build or knows of a good set of free plans so I can avoid the bother

    Thanks!

  2. #2
    Join Date
    Mar 2010
    Location
    central cal
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    21,746

    Default Re: Free skin-on-frame stand-up-paddleboard plans?

    If you plan for a ply deck, and ply frames, why not just a good old plywood board, like a “kook box”? A few sheets of thin ply and some stringers and glue and done?

  3. #3
    Join Date
    Aug 2011
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    16

    Default Re: Free skin-on-frame stand-up-paddleboard plans?

    Quote Originally Posted by amish rob View Post
    If you plan for a ply deck, and ply frames, why not just a good old plywood board, like a “kook box”? A few sheets of thin ply and some stringers and glue and done?
    Good point - I certainly could and have some ply kicking around. Mostly I just enjoy the process of making SOF and like how the end product looks. Also I suspect it'll end up at least a little bit lighter? Really joy-of-making trumps weight or performance though

  4. #4
    Join Date
    Dec 2003
    Location
    Portland, Oregon
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    73,789

    Default Re: Free skin-on-frame stand-up-paddleboard plans?

    SUP's are not hard. Popular Mechanics (or similar) published 'plans' back in the 50's, and we had 2 at our cabin. Pointed ends, otherwise dead straight & flat. We kids had a lot of fun on them.

    OTOH doing a SUP well? More serious endeavor.

    Does it have to be SOF? Because there are excellent plans for very lightweight SUP's available --

    Example. 12'-6". 10-12 kg. 3 sheets of 3mm plywood: https://www.storerboatplans.com/boat...-paddle-board/

    David G
    Harbor Woodworks
    https://www.facebook.com/HarborWoodworks/

    "It was a Sunday morning and Goddard gave thanks that there were still places where one could worship in temples not made by human hands." -- L. F. Herreshoff (The Compleat Cruiser)

  5. #5
    Join Date
    Jan 2020
    Location
    Oakland, CA USA
    Posts
    8

    Default Re: Free skin-on-frame stand-up-paddleboard plans?

    I built the Gentry Lanui (gentrycustomboats.com) SOF paddleboard spring/summer of 2020 and enjoy paddling it. He has a picture on the website of one skinned with a clear fabric so you could see what the insides look like. Of course I really enjoyed having the plans to work from.

    I lashed everything but the bow and transom. If you really want a vacation from epoxy you could also lash those.

    IMG_1399.jpg

  6. #6
    Join Date
    Jul 2015
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    Frenchman's Cove, Newfoundland and Labrador, Canada
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    282

    Default Re: Free skin-on-frame stand-up-paddleboard plans?

    As for determining the right size and shape, do you have the option of visiting an SUP rental place or store? The staff will have some educated opinions and you may be able to try some. If I were to do this, I'd drive up to 2 hours to try one in person, and if possible compare several. I once built a 17" fairly narrow SOF baidarka in a course. I hadn't used a kayak of those dimensions before and didn't like how it handled as much as the 16" fibreglass kayak I had before.

  7. #7
    Join Date
    Sep 2015
    Location
    Whangarei New Zealand
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    934

    Default Re: Free skin-on-frame stand-up-paddleboard plans?

    Good luck with this. Having made a board based on a plywood deck patch on top a a ply bulkhead and twin stringers that terminated in fins, with a couple of longerons (creating the upper rail edge) and which locate a nose and tail block at their ends, I see the feasibility Of this type craft.
    What I definitely got right was a beam dimension for decent stability and a length that provides good glide characteristics for extended paddling - beam is 28" and length 14'.
    Shape and skin of my board was carbon composite over EPS core built up between the wooden frame and ply parts (bulkhead, stringers etc.), but an alternative structure of additional stringers with fabric skin should be do-able .Shape of the bottom could well benefit from the fabric skin, in that a slight bottom concavity is the ideal sectional contour. Rails want to be well rounded ( rather than sharp edged boxy things) so think of multiple stringers as per kayak structure for the turn of the bottom into the sides.Then the top edge really wants to have a wooden capping as a rubbing strip to take paddle contact.
    Could well be that SOF with a ply deck patch is as good a SUP board as can be desired for flat water paddling, with a weight that is not much greater than a composites craft of equal size.

  8. #8
    Join Date
    May 2010
    Location
    Chicago
    Posts
    781

    Default Re: Free skin-on-frame stand-up-paddleboard plans?

    I don't remember names, but the local high school in Port Townsend, Wa. has a dynamic woman in their shop program who just challenged the kids to create their own design. I was there for the TWSBA symposium a couple years ago and, yes, some looked better than others but they all looked functional. They were also making stools from split cordwood using a shaving horse and drawknife. Go for it!
    Ken

  9. #9
    Join Date
    Sep 2011
    Posts
    3

    Default Re: Free skin-on-frame stand-up-paddleboard plans?

    I built a Dave Gentry Big Aloha, my first SOF project. Great design, great plans, very well thought out, great board. Excellent support from the designer.

    Launch day was a bit chilly. If I was choosing again I'd build Aloha, which is slightly smaller.

    https://duckworks.com/big-aloha-plans/

    IMG_0190.jpgIMG_9835.jpgIMG_9867.jpg

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