FS18 - new build - foam&carbon fiber

[Jaysen]

https://share.icloud.com/photos/029GZwJ ... U5PRA8wWZg

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[Fuzz]

https://share.icloud.com/photos/029GZwJ ... U5PRA8wWZg

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Thanks for helping this old puter guy.

[JoRoesler]

[fpjeepy05]

Hank,
Jacques (RIP) and Jeff will be the first to tell you that for boats this small a choice of foam and carbon fiber (or glass fiber) instead of good quality marine plywood is not going to save any weight. If you go to the beginning of this thread you'll some more discussion on that. Even more details are on my personal blog www.KairosAdventures.com.
The reason is that while with proper sandwich foam & efficient vacuum bagging sufficient panel stiffness and strength can be achieved at a lower weight, the skins become so thin that puncture resistance is not good enough for practical use. So what I'm essentially forced to do is overbuilding the hull by a lot. It will end up being much stronger and stiffer than necessary. I got the carbon fiber for free from a recycling project, otherwise I wouldn't dream of doing it this way. Plus it's a ridiculous amount of work. But I happen to enjoy it, and I have a usable flatsboat (a Phantom 18), so I'm not suffering.
Overall I think the boat will come out very well, and long lasting. You really have to compare it with a plywood build, glass sheathed on all sides.

Sad truth there. If a boat is strong enough to handle waves but the outer skin is so thin you can push a pencil through it, most would find that unacceptable.

Some builders, like Hells Bay, use Innegra to improve puncture resistance while keeping weight down. Some race stand-up paddleboards use dual-density foam—1-2# EPS cores with a higher-density PVC skin, then carbon over the PVC. In theory, a skiff could use a similar approach: 1/2" 4# PVC core with a 1/16-1/8" 10-20# PU skin.

Unrelated—Kairos Adventures, I found your build blog in both places now. haha

[JoRoesler]

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[JoRoesler]

[fpjeepy05]

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Getting Closer! Looks good.

[JoRoesler]

Complete hull weighs in at 360 lbs. Including all equipment and upper structures and 2 x LI batteries.

[JoRoesler]

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[cape man]

DANG!!