Time to resurrect the Ferrocement yacht? - Page 2 - SailNet Community
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post #11 of 25 Old 07-14-2015
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Re: Time to resurrect the Ferrocement yacht?

Prepper tip: build your plasticized cement pool in the shape of a sailboat hull, complete with ballast. That way, when the waters do rise you just dig out around the pool, throw on a rudder, cabin top, rigging and sail off!

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post #12 of 25 Old 07-15-2015
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Re: Time to resurrect the Ferrocement yacht?

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Originally Posted by Rhapsody-NS27 View Post
if it was a DIY job, would it help to consult the guys who spray concrete pools? They tend to spray on vertical surfaces and could give some insight to the issue.
I knew a ferro boat owner who referred to his boat as "an inside-out swimming pool."
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post #13 of 25 Old 07-15-2015
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Re: Time to resurrect the Ferrocement yacht?

I've only ever seen discussions of build quality, construction, cost, etc. Never about how they actually sail, maintenance issues while cruising or whatever. I'd be interested in hearing from someone who owns one.

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post #14 of 25 Old 07-15-2015
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Re: Time to resurrect the Ferrocement yacht?

I first saw one at anchor in Turkey. There were red stains along the hull that matched the re-bar.

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post #15 of 25 Old 07-15-2015
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Re: Time to resurrect the Ferrocement yacht?

When you can build a far stronger and far less labour intensive steel hull in two days , why bother with cement. If you want something as strong as steel ,then use steel!
I lost my first offshore boat, a ferro cement hull, on a Fijian coral reef in 1975 , in conditions which would not have damaged a steel boat at all.
Gunnite ( spray concrete ) was used in the 70s on some concrete hulls.

Last edited by Brent Swain; 07-15-2015 at 05:31 PM.
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post #16 of 25 Old 07-15-2015
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Re: Time to resurrect the Ferrocement yacht?

Quote:
Originally Posted by Brent Swain View Post
When you can build a far stronger and far less labour intensive steel hull in two days , why bother with cement. If you want something as strong as steel ,then use steel!
I lost my first offshore boat, a ferro cement hull, on a Fijian coral reef in 1975 , in conditions which would not have damaged a steel boat at all.
Gunnite ( spray concrete ) was used in the 70s on some concrete hulls.
But have the changes in the technology made this type of experience a thing of the 70s?

Donna


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post #17 of 25 Old 07-15-2015
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Re: Time to resurrect the Ferrocement yacht?

Brent, I think the point is that the newer construction techniques make it a viable alternative again. Steel construction ins't something everyone is prepared to do in their backyard, considering the costs, weight and specialized equipment.

To hear it told by metal boat advocates all the boats made prior prior to the advent of metal construction should have sunk almost immediately, and you are taking your life into your own hands if you use fiberglass or other composite techniques.

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post #18 of 25 Old 07-15-2015
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Re: Time to resurrect the Ferrocement yacht?

Yea, the concrete might have improved, but that is only a small part of the structure. The bigger issue is that it is a heavy, thick, weak material, even with modern improvements. Ferro-cement is pound for pound the weakest material available. It was only popular as a home boat maker material because of ease of use and price. If I were to make a boat at home I would cold mold it. And the hull is really a small portion of the cost of a boat, so trying to save on the hull cost does not really help much. On top of it very few people have the time anymore to actually there own boat, I think there is likely only a small percentage of the number of home builders there once was. Then add to that the used boat market where you can get a complete ready to go boat for less than the materials to make a hull I really don't see that there is much need for this. Not to mention that the material tends to make poor sailing boats and requires continuous maintenance to keep it looking good.
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post #19 of 25 Old 07-16-2015
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Re: Time to resurrect the Ferrocement yacht?

The cost of home-building isn't in the hull, it's in the fittings, and those are the same no matter what you use as a hull. After 60+ years of fiberglass hulls, it will be easier to find a bare glass hull in solid condition and build that up, for larger boats (say >25'). For small boats, I don't think anything beats stitch-and-glue plywood for speed and ease.
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post #20 of 25 Old 07-16-2015
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Re: Time to resurrect the Ferrocement yacht?

Quote:
Originally Posted by zedboy View Post
The cost of home-building isn't in the hull, it's in the fittings, and those are the same no matter what you use as a hull. After 60+ years of fiberglass hulls, it will be easier to find a bare glass hull in solid condition and build that up, for larger boats (say >25'). For small boats, I don't think anything beats stitch-and-glue plywood for speed and ease.
That's where the 3-D printer comes in.

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