CS23 Build Config: Open Deck / Closed Transom

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fallguy1000
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Re: CS23 Build Config: Open Deck / Closed Transom

Post by fallguy1000 »

You really want to address them as a matter of continuity. So, any place where delam can grow should be repaired well.
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fallguy1000
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Re: CS23 Build Config: Open Deck / Closed Transom

Post by fallguy1000 »

B99E2031-9172-44F3-98E0-26CB446D6E97.jpeg
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rsiedl
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Re: CS23 Build Config: Open Deck / Closed Transom

Post by rsiedl »

OK, I've sorted out all the bubbles and am ready to put on the skeg and strakes.

I'm wondering if there are alternatives to using timber for these parts? It would be great to have something a bit more durable.

I've seen one idea of making up a form and filling it with chopped glass and epoxy. This might be a little tricky on the curved parts of the hull.

Also there was a post from Jacques where he mentioned using "HD plastic (Aquaplas)". I've searched for Aquaplas but not found anything.

Is there another type of plastic which would bond well to the epoxy?
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OneWayTraffic
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Re: CS23 Build Config: Open Deck / Closed Transom

Post by OneWayTraffic »

I personally think that a couple of layers of glass over wood would be absolutely fine.
Or you could do as I did and glue some UHMWPE strips to the hull. I have details on the prep work to glue that in my C17 thread.

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Re: CS23 Build Config: Open Deck / Closed Transom

Post by Fuzz »

I took a piece of 1 inch angle iron and used it as a mold. Wax it and level fill with epoxy and glass fibers. When you pull it from the mold and still green it is pretty flexible. You can bend it to shape and glue it to your hull.

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BarraMan
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Re: CS23 Build Config: Open Deck / Closed Transom

Post by BarraMan »

rsiedl wrote: Thu Aug 11, 2022 8:34 pm OK, I've sorted out all the bubbles and am ready to put on the skeg and strakes.
I'm wondering if there are alternatives to using timber for these parts? It would be great to have something a bit more durable.
I've seen one idea of making up a form and filling it with chopped glass and epoxy. This might be a little tricky on the curved parts of the hull.
Also there was a post from Jacques where he mentioned using "HD plastic (Aquaplas)". I've searched for Aquaplas but not found anything.
Is there another type of plastic which would bond well to the epoxy?
I made my stakes from 1.5" x 1.5" hoop pine, cut in two on the diagonal, glued and screwed onto the hull initially then screw removed and the holes filled with epoxy/woodflour. I then covered them with 2 x layers of 6" 6 oz biax 'tape'. 6 yrs later they are doing just fine! That said, I mostly operate over mud or sand, rarely stones, rocks or oyster beds.

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Last edited by BarraMan on Fri Aug 12, 2022 7:40 pm, edited 1 time in total.

TomW1
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Re: CS23 Build Config: Open Deck / Closed Transom

Post by TomW1 »

Fuzz and Barraman's way are the easiest way to go. Round over the skeg and do as Barraman did also. Tom
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rsiedl
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Re: CS23 Build Config: Open Deck / Closed Transom

Post by rsiedl »

Thanks for the advice on the strakes. I think I'll go down the path of milled glass/epoxy in some angle.

I am after some advice on mixing my own fairing compound.

Wood flour is hard to come by here so from my research I've settled on a mixture of Cabosil and Q-Cel 5020 (hollow sphere glass micro balloons).
https://www.cfsnet.co.uk/acatalog/Q-Cel_Range_TDS.pdf

The reading suggested a mix of 3:1 Cabosil to Q-Cel, so I made up a test piece to try it out. On the right was a mixture of Cabosil/Q-Cel and on the left was 100% Q-Cel.
Image

Cabosil/Q-Cel
Image

Q-Cel
Image

Both held their shape during application but the Cabosil mixture "ran" after some time and flowed down.
Image

The Q-Cel mixture stayed as it was applied.
Image

I'm sure if I try and apply the Cabosil/Q-Cel mix to the hull it will just run out of the areas that need filling and make things worse.

The 100% Q-Cel mix would stay in the lows but it didn't have the smoothest of finishes.

Has anyone got any advice?

My questions:
- What consistency should the fairing compound be when applied?
- Should it the "run" afterwards, or hold the same shape as when it was applied?
- How thick should I be applying it?

Thanks in advance!
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fallguy1000
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Re: CS23 Build Config: Open Deck / Closed Transom

Post by fallguy1000 »

I mix 10 grams of cabosil and 40 grams of spheres..
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rsiedl
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Re: CS23 Build Config: Open Deck / Closed Transom

Post by rsiedl »

Thanks fallguy.

Is it worth colouring it with anything?
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