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Go Back   SailNet Community > On Board > Gear & Maintenance > Alodine
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Thread: Alodine Reply to Thread
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Topic Review (Newest First)
10-12-2013 04:11 PM
JSailer
Re: Alodine

Quote:
Originally Posted by overbored View Post
the tubing is quite strong. in compression as strong as the aluminum.
I doubt that the cabin top is relying on those tubes for strength. the cabin top is the same as used in the fixed keel model which does not have the tubes
Great point about the fixed keel model.
Thank you.
10-12-2013 01:49 PM
overbored
Re: Alodine

the tubing is quite strong. in compression as strong as the aluminum.
I doubt that the cabin top is relying on those tubes for strength. the cabin top is the same as used in the fixed keel model which does not have the tubes
10-12-2013 09:24 AM
JSailer
Re: Alodine

Oh, I like that fiberglass idea...
Checking into availability...
What sort of strength can I expect vs aluminum?
I'm just thinking of stepping on the cabin top and putting stress on it.
10-12-2013 02:05 AM
SlowButSteady
Re: Alodine

Clicky-clicky
10-12-2013 01:42 AM
overbored
Re: Alodine

there are suppliers of pre anodized tubing. also might consider fiberglass tubing like Centek vernatube exhaust tube.
10-12-2013 12:38 AM
JSailer
Re: Alodine

Quote:
Originally Posted by CalebD View Post
The C/B pennant on my Tartan 27' runs through some sort of black hose to the C/B trunk. There is salt water in the bottom of it only.
This boat does not have a trunk in the cabin.
The tube goea down to the top of the keel just below the cabin sole which is about 2 to 3 feet below the waterline.
10-12-2013 12:16 AM
JSailer
Re: Alodine

The original tube is aluminum and lasted 35 years and is just now starting to go...
I had been advised to stay with Aluminum.
I considered SS but was told I might have bigger corrosion concerns with it. I am not a metal expert (obviously) but i have seen SS fittings or parts corrode underwater in short period of time before so I am not convinced SS will be the answer but I am still open to that idea.
My concern is the area right by the waterline sloshing in and out of water/air.

Also, the tube has to be rigid and solid because it goes through the cabin table and I offers some stability, and it also offers some support to the cabin top.
10-11-2013 11:35 PM
MarkSF
Re: Alodine

In my opinion, the best metal would be bronze. But maybe some kind of plastic or polymer would work? Here is what McMasterCarr can do :

McMaster-Carr

How about PTFE-filled delrin?

What was the old tube made of?
10-11-2013 10:20 PM
CalebD
Re: Alodine

The C/B pennant on my Tartan 27' runs through some sort of black hose to the C/B trunk. There is salt water in the bottom of it only.
10-11-2013 08:55 PM
Delezynski
Re: Alodine

Quote:
Originally Posted by JSailer View Post
Thank you for the replies.
I need to replace the tube that the centerboard cable goes through.
It is about 8 inches into the keel and goes through the cabin up to the deck.
It's 1.5 in OD with 1/8 wall.
About 3 feet would be under water (by that, I mean saltwater will be inside the tube at all time up to the waterline).
JSailer,

Have you considered some other material, other than a metal tube?

I have never had a swing keel so I am on shaky ground, but I might think about something like a reinforced exhaust hose?????? Just thinking outside the box.

Greg
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