HFJY34

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  • 10 Jan 2021 16:26
    Reply # 9822657 on 9742196
    Anonymous wrote:

    Great progress Frederik, I'm also watching very closely. Are you glueing the two layers of plywood together with (lots of) epoxy? I've wondered about using a PU (D4) glue for this, it's cheaper and gap filling and it's probably what the ply is made from but it may be impossible to work with big sheets of ply fast enough and it won't seal the ply as well as epoxy. Anyone else have thoughts on this?

    Also, I'm intrigued by Chris Morejohn successfully going against all advice I've ever seen (including his friend Reuel Parker) and using polyester resin over plywood. Any thoughts on this?



    I've used Collano Semparoc 60 between the layers of ply. In case you don't already know, it's a PU expanding, waterproof adhesive categorised as C4. As I understand it, C4 is probably more suitable than D4 as the C group are thermosets and the D group are thermoplasts.There is no problem time-wise with gluing up big sheets; the working time is perfectly adequate.


    Anyhow, so far, I'm happy with the results - it certainly seems to stick well!. Unfortunately the boat isn't in the water yet, so I can't tell you anything about long-term performance...

  • 09 Jan 2021 12:42
    Reply # 9776140 on 7155071



    Yes it’s coming along nicely and most of all it’s great fun to build a boat. I decided very early in the build to go with the way Chris Morejohn builds his plywood boats and that includes his method of glassing the hull with polyester resin. 3 layers of matt plus 1 layer of cloth. The whole boat is glued and scewed together with 2:1 epoxy and stainless steel 5 mm screws. The screws stay in. His boat is in great shape after 20 odd years of heavy use. 

    Now as for doing it alone, yes, most of it is no problem. The design is doable for a first-timer like me and when it gets to gluing the large sheets I call on friends that help me out. I also have a boatbuilder friend that has helped me out with the beveling of the bottom and some other stuff that I didn’t want to tackle by myself with my limited skills. Another great help is Chris himself who takes his time to  answer all my silly questions.

    Its been great to be able to build at home in the temporary but  bulletproof shed. These cold winter days I can continue the work When glueing large areas I turn on an external heat canon and raise the temperature to what’s needed. 


    So. The second layer of ply (first inside layer 10 mm sapele marine ply, second layer 12 mm fir) on and finished beveling the chine yesterday. 

    On to the bottom..  

    4 files
    Last modified: 10 Jan 2021 14:31 | Anonymous member
  • 07 Jan 2021 23:57
    Reply # 9753043 on 9742196
    Jan wrote:

    Great progress Frederik, I'm also watching very closely. Are you glueing the two layers of plywood together with (lots of) epoxy? I've wondered about using a PU (D4) glue for this, it's cheaper and gap filling and it's probably what the ply is made from but it may be impossible to work with big sheets of ply fast enough and it won't seal the ply as well as epoxy. Anyone else have thoughts on this?

    Also, I'm intrigued by Chris Morejohn successfully going against all advice I've ever seen (including his friend Reuel Parker) and using polyester resin over plywood. Any thoughts on this?

    I once owned  Searunner trimaran in which I cruised the Pacific. It was built just before the use of epoxy became a widespread. It was sheathed using polyester resin. It held up very well although I noticed that when removing fittings, such as windows for renewal, that the fiberglass sheathing would peel away from the underlying plywood very easily.  I also think it did not provide a fully waterproof barrier based on the degradation of fastenings under the sheathing. Usually the reason for using polyester resin would be for cost saving, but when building a large boat the epoxy resin would normally be purchased in bulk at a discounted price, so I think there would need to be a significant cost saving to justify using the polyester. I also personally find the fumes from polyester resin to be significantly worse than those from epoxy.
  • 07 Jan 2021 11:57
    Reply # 9742196 on 7155071

    Great progress Frederik, I'm also watching very closely. Are you glueing the two layers of plywood together with (lots of) epoxy? I've wondered about using a PU (D4) glue for this, it's cheaper and gap filling and it's probably what the ply is made from but it may be impossible to work with big sheets of ply fast enough and it won't seal the ply as well as epoxy. Anyone else have thoughts on this?

    Also, I'm intrigued by Chris Morejohn successfully going against all advice I've ever seen (including his friend Reuel Parker) and using polyester resin over plywood. Any thoughts on this?

  • 07 Jan 2021 10:40
    Reply # 9740693 on 7155071

    Looking good Frederik. Nice to see someone else covered in epoxy!! ;-)

  • 05 Jan 2021 15:38
    Reply # 9692407 on 7155071

    Hi Frederik,

    Thank you for sharing the build photos. I have been intrigued by Chris Morejohn's designs for some years now. Seeing photos of your boat build in a temporary shelter helps keep my dreams of building a boat alive.

    I would be interested in any details you care share, if you have time. I would like your opinion on how technically difficult it is to build this design. Have been able to do all the work 'single handed'?

    While I was checking the spelling of Mr. Morejohn's last name I noticed that Hogfish Maximus is for sale.

  • 15 Dec 2020 10:38
    Reply # 9430871 on 7155071

    Clogfish. Inspired by good old Dutch footwear.

    First layer of 10 mm sapele in place. Next layer to be 12 mm fir ply.

    Big boat..


    6 files
    Last modified: 15 Dec 2020 10:40 | Anonymous member
  • 08 Nov 2020 01:00
    Reply # 9350667 on 7155071

    Gosh, you are doing a great job.  And now for planking!  It's so exciting when you start seeing a solid boat.

  • 06 Nov 2020 18:31
    Reply # 9348935 on 7155071

    Good progress Frederik, you will have a hull soon!

    regards Rudolf

  • 06 Nov 2020 13:10
    Reply # 9348246 on 7155071

    Some more picks of the actual work involved.

    6 files
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