Woods Skoota 32DM

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Jaysen
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Re: Woods Skoota 32DM

Post by Jaysen » Sat Jun 23, 2018 4:48 pm

What are you using for fairing compound?

I'm asking because I "thought" (and that's ALWAYS bad for me) that you didn't want to use anything "softer" than wood flour/cabosil as it would be more likely to fail under glass. Knowing your methods there's an answer that I haven't been exposed to yet.

Thanks!



fallguy1000
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Re: Woods Skoota 32DM

Post by fallguy1000 » Sat Jun 23, 2018 11:07 pm

I use different mixes for different stuff.

Any interlaminar fairing I use epoxy and 50/50 cab/milled glass. It is heavy, but it has some body and hoping some strength.

Any structural panels joins are cabosil n epoxy. Same with all fillets.

All glue joining is cabosil n epoxy.

Any prefairing or bulk fairing is 50/50 cabosil and microballoons and epoxy, but rarely interlaminar.

System 3 Quikfair is my final approach mix.

Tomorrow I will except from above rules and use balloons and cabosil around the beaching keel thay will be under a tape. The reason is I don't need strength and don't want to add weight. It is a lighter mix, but a little harder to use than epoxy and cabosil. It tends to be a little like a melted marshmallow. Cost n weight is the driver here.

I have a bunch of ground corecell that is ultralight and real bulky. I used a bit of it in a few places with cabosil at 50/50, but not sure it isn't a little porous. Still trying to find a good home for it in the build.
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fallguy1000
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Re: Woods Skoota 32DM

Post by fallguy1000 » Sat Jun 23, 2018 11:32 pm

Based on your statement, I'd say you are right. Keep the stuff going under glass on the harder side for the most part.

I don't like using milled fiber. I used a little under a gallon of it in each hull. All of it was used in the forward section/bow area to strengthen the front of the boat and fill in a forward area. It is probably 15 pounds per gallon; so horribly heavy.
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Jaysen
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Re: Woods Skoota 32DM

Post by Jaysen » Sun Jun 24, 2018 5:24 am

Thanks for the explanation! One follow up, why wouldn’t strength be an issue here? I’d think the beaching keel would be an area you’d want more strength not less.

Thanks!

fallguy1000
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Re: Woods Skoota 32DM

Post by fallguy1000 » Sun Jun 24, 2018 9:25 am

The beaching keel is glued on with cabosil n epoxy. The specs per the designer allow it to be glued or taped on. I am doing both and permanently because I want the hull fairer to try and avoid creating turbulence ahead of the prop and for smoother flow through the water. The tape is thus largely a part of fairing. Yes; it is also providing an assurance the keel won't ever come off. Say the glue bond ? Cracked?

There is also a piece of wood that gets 5200d to the top of the keel that is sacrificial.

The glass schedule from the outside of beaching keel to the inside of the hull is
1708
8? oz aramid
1708
1708
1700
1700
1700
1700
Hull
22 oz tri
22 oz tri
12mm core
22 oz tri
22 oz tri

The tape goes over the keel flange and isn't in the above scheme. You can see the strength is irrelevent when you realize all the laminates. Yes there are 16 layers of glass. There are actually 21 because the boat has two core panels midships with two 4" tapes down the middle exterior and 3 tapes 6-6-8 on the inside.

The reason for all the glass, though is to make the beaching keel strong enough to not break under vessel weight in point loading. It is the strongest place on the boat. You can jump on it and nothing moves.

The boat has watertight compartments from stem to stern; except for between BH2 and BH3. The beaching keel is there; so the boat is very well protected from any breach that would result in water entering and if it did; the likelihood of ruining a long voyage is low.

I'll take another picture of the faired beaching keel and you'll get it.
My boat build is here -------->

viewtopic.php?f=12&t=62495

Jaysen
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Re: Woods Skoota 32DM

Post by Jaysen » Sun Jun 24, 2018 9:59 am

I didn’t realize how much was going on there.

Thanks for the information. I feel a bit smarter about when you can cheat a bit with the balloons.

fallguy1000
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Re: Woods Skoota 32DM

Post by fallguy1000 » Thu Jun 28, 2018 12:19 am

Bottom chine tapes were Tuesday
E0750E6D-62F7-4BEA-AEA9-F44F13B23B18.jpeg
This shows me using a lightweight fairing mix that will be under the tape that helps keep the beaching keel on. I used about 24oz epoxy and 50/50 cab/balloons. The fairing is needed because the keel flange is 3-4 layers of glass. 1708.1700.1700.kevlar ends only
F6ECB13D-0B0A-4C4C-ACFE-45CBB4E64C59.jpeg
Faired all around. Done with fast epoxy.
769DDF63-25E6-48D5-A2D7-D394860C1BB0.jpeg
After lunch we made a 6 oz batch and filled it a bit higher and taped it.
94FB4DBF-023B-4039-A31A-9D841778DD66.jpeg
My boat build is here -------->

viewtopic.php?f=12&t=62495

Jeff
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Re: Woods Skoota 32DM

Post by Jeff » Thu Jun 28, 2018 7:04 am

Nice work Fallguy!! Jeff

OrangeQuest

Re: Woods Skoota 32DM

Post by OrangeQuest » Thu Jun 28, 2018 7:50 am

It does look really good. What I find interesting is you don't know the size of the hulls till there is someone standing next to one in a picture.

fallguy1000
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Re: Woods Skoota 32DM

Post by fallguy1000 » Thu Jun 28, 2018 9:25 am

In a couple weeks, both hulls will be upright in the garage together. They will be taking a lot of space.
My boat build is here -------->

viewtopic.php?f=12&t=62495

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