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foam holding water
http://www.hobie.com/au/en/forums/viewtopic.php?f=9&t=43012		 Page 1 of 1
Author:  Wind Wizard [ Tue May 29, 2012 7:41 pm ]
Post subject:  foam holding water
Hi new to Hobie. just got an old hobie mono 11'9" boats a bit heavy. Read someplace that they had problems with foam holding water. any post on what to do to fix this. I think this boat looks like fun. if I can get it in the water
Author:  mmiller [ Wed May 30, 2012 4:48 pm ]
Post subject:  Re: foam holding water
This has been discussed a few times. Mostly it is very difficult to dry this out. Impossible to open and remove as the foam is structural.

Try a search for monocat foam.
http://www.hobiecat.com/forums/viewtopic.php?f=9&t=37786&p=167184&hilit=Monocat+foam#p167184
Author:  Wind Wizard [ Wed May 30, 2012 5:52 pm ]
Post subject:  Re: foam holding water
thanks for the help
Author:  ASDASC [ Fri Jun 01, 2012 12:41 pm ]
Post subject:  Re: foam holding water
Has anyone tried sticking it in the attic for a year or two? It seems the heat will help dry it out over time, then just be sure it stays stored in a dry location when not in use.
Author:  Bacho [ Fri Jun 01, 2012 1:46 pm ]
Post subject:  Re: foam holding water
I had a monocat as well that ended up in the dump. Another big problem with this is that the aluminum has likely corroded down to almost nothing because of is sitting in the soaked foam. There is just about nothing you can do to dry it, and even if you could, the boat just does not have that great of a design to keep the water from getting in again.
Author:  michaelmorris [ Mon Jun 04, 2012 6:53 am ]
Post subject:  Re: foam holding water
I hate to join the naysayers, but I had a Monocat that I let sit at 30 degrees bow up in the sun for two summers to try to dry it out. It was still so heavy after that it took three people to lift it and it sailed with only an inch or so above the water on the side you sit on.
When I wrecked it, I cut it apart and found that like everybody had said, it was just waterlogged to the max. 1 foot cubes of the foam I pulled out would weigh upwards of 30lbs.
Its really sad because the boat was a fun little one for short sails.
Author:  ASDASC [ Sat Jun 09, 2012 4:30 am ]
Post subject:  Re: foam holding water
So if someone finds one for sale locally in good shape, what SHOULD it weigh?
Author:  Bacho [ Sun Jun 10, 2012 5:14 am ]
Post subject:  Re: foam holding water
You should be able to pick up the hull by yourself, somewhere around 150 lbs. The water logged ones weigh more like 3-400 lbs.
Author:  ET Hobie guy [ Sun Jun 24, 2012 7:11 pm ]
Post subject:  Re: foam holding water
Sunfish are notorious for getting waterlogged. They can be dried out. Do a Google search on drying out a Sunfish and you will find a lot of good info.
Author:  MBounds [ Sun Jun 24, 2012 8:25 pm ]
Post subject:  Re: foam holding water
ET Hobie guy wrote:
Sunfish are notorious for getting waterlogged. They can be dried out. Do a Google search on drying out a Sunfish and you will find a lot of good info.
A Sunfish and a Hobie Monocat have vastly different construction methods and materials.

A Sunfish fiberglass, with foam flotation blocks (much like the fiberglass models of Hobie Cats) and is mostly open space on the inside, which allows airflow to gradually dry the flotation foam (once ports are installed).

A Monocat is essentially a foam hull covered with a thin ABS plastic skin. The foam is not only for flotation - it's structural. There is no way to get airflow in/out the hull to allow the foam to dry.

This thread has the dissection photos that show how the hull was constructed: viewtopic.php?f=9&t=37786

Unfortunately, this model (and the Hobie 12 monohull) were doomed from the beginning by this construction method - and precipitated their early demise.
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