Foam?

[ebfoxbat]

I'm looking to shape my hull out of some type of foam. I plan on fiberglassing over the foam. Then hollowing out room for my radio box et al.

Can someone recommend a good foam to use. I'm looking for minimal structural support, just enough for the fiberglass to set up but I'll need to be as buoyant as passable.

Thanks.

[CG Bob]

You can use the Dow blue foam (http://www.dow.com/styrofoam/na/res-us/products/square_edge.htm), or the Owens Corning pink foam. Depending on where you live, getting the thicker pieces of foam insultation can be a problem. If you live in an area with lots of pleasure boats, you can look for the foam flotation billets for piers. The Dow foam is available in 2 fy x 8 ft or 4 ft x 8 ft pieces. Use epoxy finishing resin to lay up the fiberglass cloth; polyester resins tend to eat the foam.

[ebfoxbat]

...]Dow blue foam or the Owens Corning pink foam...

I was thinking about similar foams. I'm going to make this self-righting so I'm looking for something that's as buoyant as possible.

[ScottOram]

I was thinking about similar foams. I'm going to make this self-righting so I'm looking for something that's as buoyant as possible.

Foam can be found at your local home center in 4 x 8 sheets in a variety of thicknesses. Layer and cut to shape.

I used spray insulation foam layered around a wood skeleton for shaping. About $4.00 a can.

http://i18.photobucket.com/albums/b120/ScottOram/CVRC64/000_0880.jpg

http://i18.photobucket.com/albums/b120/ScottOram/CVRC64/000_0883.jpg

http://i18.photobucket.com/albums/b120/ScottOram/CVRC64/000_0884.jpg