1970 Seafari conversion to CC

[Bushwacker]

Originally Posted by afishin82

Not entirely sure wat torsional stiffness is but I want it! . . .

Take a shoe box and try twisting it with no lid on it. Then tape the lid on it, twist it again and note the difference. The original Seafari is like the box with the lid on it, but you took the "lid" off!

[afishin82]

Wow great analogy thank you!

[FishStretcher]

Foam trapezoids here. I ripped them on a table saw. Ok, my dad, the furniture maker did. On the 25, I tabbed them in with 2 layers of 1708 in vinylester.

There is a recipe (scantling rule) for this but if you have the foam in there, it would be difficult to use too much tabbing. I wouldn't worry about using 2 layers of 1708. Getting it to stick to the vertical runs is fun.

http://www.classicseacraft.com/commu...t=25405&page=9

Not trying to fit them blind, on your belly, while under the deck will be easier.

[thehermit]

btt...how this going?

[afishin82]

Slowed down for a bit and just started picking things back up. I got all the bulkheads glassed in put the floor for the fuel tank in rigging tubes for the fuel fill and vent lines and have also been preparing to core and finish the cap. I also picked up a 20' wellcraft fisherman for the console leaning post and ttop which was a steal compared to buying all the parts separately! Getting the console was big for me to move forward so should start making good progress again! I will post more pics when I get a chance.

[afishin82]

Here are some pics

[Bushwacker]

Are those strips of rubber you're planning to lay the gas tank on? Not a good idea as the carbon in the rubber will create a galvanic couple with the aluminum and cause galvanic corrosion of the aluminum! Better to use some thin strips of pvc board or starboard to keep the aluminum up off the tank support.

[afishin82]

I will be epoxy coating the tank before installing it. Will it still be an issue with the rubber?

[Bushwacker]

Should be ok IF the epoxy bonds well and stays intact. Might be worth using an etching primer and applying a couple coats of epoxy on the bottom. I painted my tank with a zinc chromate/epoxy primer from Sears when I got the boat in 1975. I pulled the tank to inspect it and replace hoses when I repowered in 2006 and it was still in good shape. But whatever you do, DON'T foam in the tank!

[Normagain]

Originally Posted by afishin82

I will be epoxy coating the tank before installing it. Will it still be an issue with the rubber?

If they are neoprene (synthetic rubber) strips, no carbon in those.