[Public-list] Water tank cover

[Mike Lehman]

Hi Bob,

It was a long time ago, but they were either #8 or #10 and they were short, 
just long enough to go through the epoxy and through the hole in the boat 
liner. Come to think of it, I sized the screw just large enough to fit tight 
in the hole left by the rivets.



Mike Lehman
~~~_/)_/)~~_/)~~~




----Original Message Follows----
From: Bob Crinion <bob at fox.nstn.ca>
Reply-To: Alberg 30 Public List -- open to all <public-list at alberg30.org>
To: 'Alberg 30 Public List -- open to all' <public-list at alberg30.org>
Subject: RE: [Public-list] Water tank cover
Date: Mon, 27 Jun 2005 15:43:40 -0300

Hey Mike,

What size SS screws did you use to fasten the epoxy top on the water tank?

Thanks,

-bob
A30 #560

-----Original Message-----
From: public-list-bounces at alberg30.org
[mailto:public-list-bounces at alberg30.org] On Behalf Of Mike Lehman
Sent: Monday, June 27, 2005 9:35 AM
To: public-list at alberg30.org
Subject: Re: [Public-list] Water tank cover

Michael,

The 'sand' is aluminum oxide on the underside of the tank lid that falls
into the water. I did this repair over 15 years ago. My solution was to buy
a 1/4" sheet of G10 epoxy and use the old aluminum cover as a pattern. I
spray painted over the holes to mark the epoxy sheet so the holes would line

up with those on the boat. I installed an inspection plate in the new cover,

and installed the new cover with 5200 and SS screws. Those of you that have
the newer style boat and have a water leak in the forward cabin, may
discover, as I did, that the old tank top was leaking around the sides.
Thats because the aluminum top was installed with rivets, and rivets have
holes trough their centers and when the tank is full and the boat is
pounding through waves there is a tremendous amount of force on the
top...and it leaks. Well mine no longer leaks since the repair.

Mike Lehman
~~~_/)_/)~~_/)~~~




----Original Message Follows----
From: "Michael Grosh" <dickdurk at atlanticbb.net>
Reply-To: Alberg 30 Public List -- open to all <public-list at alberg30.org>
To: "Alberg 30 Public List -- open to all" <public-list at alberg30.org>
Subject: Re: [Public-list] Water tank cover
Date: Mon, 27 Jun 2005 06:24:20 -0400

 >The original anodizing is gone so now it's just plain sheet
 >aluminum.

Anodizing is just a chemical process that accelerates and magnifies the
creation of aluminum oxide (rust, if you will). It's the oxide that makes
aluminum so resistant to degrading because it is an airtight seal, and it
forms almost immediately on it's own, unless interfered with by some other
process (I understand mercury really screws up aluminum's ability to protect

itself).

Aluminum is a component of solid rocket fuel-highly reactive.

this 'sand' doesn't sound like aluminum flaking off-it sounds more like a
salt; some kind of dissimilar metal reaction, perhaps?

Michael Grosh
#220
BTW cured epoxy is non toxic even if you do eat it, unless you plug up an
intestine or something.


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