Coosa

[Scott]

What a coosa?

Jorge … you may have figured it out already but Here’s Coosa …..

It’s a composite core material that is suppose to be ultra tough

[Scott]

Bryan ... I emailed them one night and the next morning had a reply and a sample was on its way ( I didn't even specifically ask for one). I emailed them back and they sent me more info in with the sample package. Very responsive.

ob1 thanks for the info....

I did wish that they had comparison numbers agains plywood ... I did not see or get anything like that. I'm also curious as to how this stuff handles self tapping screws. Its very light (Bluewater 26) and curious if they would strip.

[ob1jeeper]

Scott,
Here's a link for plywood design spec's, which should give you all the info you could want for comparison. I had the Comparison stuff saved on my old PC, until it died

Best of my memory was that tensile, shear, modulus, and fastener holding strength the Coosa 20 either very closely meets or in many cases exceeds that of ply's., and the blue-26 was better in ALL catagories... But don't quote or hold me to that .

Download yourself a copy of Y510 (free with use of adobe acrobat), then read away...

[CJR]

Scott,

You are correct "Yikes". That is what I said plus a few other choice words. I have removed all of the wood from the boat and will or have used coosa for the transom, deck, cap,
hatches , everything where a core is needed.Also, I replaced the fuel tank and used a piece of 3/4"coosa for the fuel tank bed( 8'L x 28" w).The console is going to be stiffened with 1/2" coosa because I am having a hard top frame fabricated which will be mounted to the console rather than screwed into the deck. It doesn't take long before material usage mounts up. Basically 25% of the cost
of the coosa is in the transom alone.

[FELLOW-SHIP]

Although I have never used the stuff I really like it based on so many guys which have and told me so. But it sure does cost $$. The biggest concerns on SeaCrafts is the transom area due to it needing to be strong, light, and rot free. If money is a issue you could just do the Transom with it, then use other materials for the rest of the boat where weight and strength and rot free is not as much of a issue. I personally really like a heavy boat for the ride but with a 8’ beams boat “lighter is better” in the transom and 30% lighter that wood sounds really good to me.


FellowShip

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My motto: Just for the Grins

[JAL]

Couple of thoughts/questions,

Does the Coosa board actually absorb epoxy like a wood core does?

How much weight does the plywood core in a transom actually add over a coosa cored transom?

[warthog5]

No the epoxy doesn't go into Coosa like plywood. Remember a tree has pores in it.


Plywood is almost double the weight.