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Issuma
Fitting the new day tank
Richard
Mon Jan 26 0:00:00 EST 2009, San Fernando, Buenos Aires, Argentina

The new day tank fits entirely into an existing access hole in the bottom of the cockpit. Nuts were welded to the underside of the steel cockpit bottom to bolt the tank to, and here the paint is being ground off in preparation for welding the nuts in.

New day tank
Richard
Mon Jan 26 0:00:00 EST 2009, San Fernando, Buenos Aires, Argentina

The "day tank" is a fuel tank that supplies the engine for a while (not really a day in this case), and is refueled from other tanks in the boat. The day tank simplifies switching between fuel tanks, and can be used to help separate out water and dirt in the fuel (being heavier, they sink to the bottom and can be removed if there is a drain at the bottom of the tank).

The old day tank was a cylindrical plastic affair, with fittings Sikaflexed (Sikaflex is a brand of glues and sealants) into it. It had been leaking, and the Sikaflex used to repair it was getting into the fuel and starting to clog the fuel filters.

I wanted a bigger day tank (the old one was only good for about three hours of motoring) that didn't leak and would help separate out the water and dirt from the fuel. This is the new day tank, made of stainless steel, much bigger, minus the fittings, which were installed after the tank was installed. The new tank is built to fit into an existing cutout in the cockpit floor.

The Disarray
Richard
Sun Jan 25 0:00:00 EST 2009, San Fernando, Buenos Aires, Argentina

There are a number of jobs going on at once on Issuma, and the pilothouse is now a mass of disarray.

Wed Jan 28 1:04:20 EST 2009 | george Ray
The pivoting instrument panel has a new white rectangle below the depth finder. What changes are happening there?
Wed Jan 28 11:33:45 EST 2009 | Richard Hudson
The GPS is being replaced. Sadly, the french GPS that came with the boat died. This likely happened when replacing the house batteries without disconnecting the solar panels, which spiked the voltage up.

The new GPS is a Furuno. The manual indicates there are data averaging settings that will will allow it to display believable courses and speeds like the old one did (unlike Garmins which never seem to do so correctly).
New pulleys for keel
Richard
Sun Jan 25 0:00:00 EST 2009, San Fernando, Buenos Aires, Argentina

The pulleys that are used by the winch to raise and lower the keel were badly corroded. The wire kept slipping off one of them, and two others were seized up and would not turn. All were replaced with new stainless steel pulleys with more grease nipples to make maintaining them easier.

Wed Jan 28 0:57:24 EST 2009 | george Ray
Hurray! Great to see the pulley system fixed up and easier to grease. Did you manage to get the cable soaked in hot tallow? I guess work is also happening to fix/improve the centerboard restraining pads.
Wed Jan 28 11:35:18 EST 2009 | Richard Hudson
Cable still needs to be replaced, and is still greasy. The bad keel pad had the bolts cut out and it was fixed (internal O ring failure) and reinstalled. Spare units did not fit the holes.
Something completely different
Richard/Victoria
Mon Jan 19 0:00:00 EST 2009, Buenos Aires, Argentina

The boatwork continues to progress on Issuma. The other night we went to see a really good band from northern Argentina, La Bomba del Tiempo. The band played outside on a hot summer night, and the crowd loved the band. The girl in the picture is one of several people who were being passed around through the crowd.

Sun Jan 25 17:15:50 EST 2009 | imeldita
guys, nice posting/picture! the colors... the exuberance it conveys. wish i could be there (not to sail per se...)
Wed Jan 28 11:36:48 EST 2009 | Richard Hudson
Buenos Aires is a really fun place (though a bit too hot in summer).
Painting the bottom
Richard
Sun Jan 18 0:00:00 EST 2009, San Fernando, Buenos Aires, Argentina

The old antifouling (paint that is put on the bottom of a boat to discourage barnacles from attaching themselves to the hull) was sanded off, the underlying paint inspected, and epoxy paint then put on. The purpose of the epoxy paint is to electrically insulate the steel hull (which is actually coated with zinc in this case) from the copper that is in the antifouling paint.

The first attempt at putting the epoxy on didn't go well, as it was not mixed well enough (it comes in two components, that must be mixed together correctly) before painting. Epoxy that is mixed incompletely or incorrectly results in paint that will never "dry" (cure). The following day, the incorrectly mixed paint was laboriously removed so the painting could be started again.

The first coat of epoxy is on. The zebra look is from running out of white and substituting black (the next coat will be entirely black).

Thu Jan 22 7:28:39 EST 2009 | George Ray
Did any interior work like new tanks get done or will that wait for another time?
Fri Jan 23 0:15:34 EST 2009 | Richard Hudson
The day tank is being replaced with a bigger one. The welders were not able to put any more tanks in at this time.
Welding on new Zincs
Richard
Sat Jan 10 0:00:00 EST 2009, San Fernando, Buenos Aires, Argentina

Metal boats have pieces of zinc alloy (anodes) attached to them to protect different metals from electrochemically reacting (corroding) to each other when in water. The zinc anodes wear away (the zinc slowly migrates to other metals, such as the bronze propeller) and eventually need to be replaced. All the zinc anodes are being replaced on Issuma while she is hauled out.

In the picture, the new zinc anode is being welded to the hull. Unfortunately the welding of some of the zincs was done too quickly and the heat that built up burned off the paint inside the boat, which we now need to scrape off and repaint (steel boats rust if they are not painted, and rust inside, where you don't see it, must be avoided). But the hull will be well-protected now, and shouldn't need the zincs replaced again for several years.

Mon Jan 19 5:46:49 EST 2009 | George Ray
Great to see Issuma shipyard progress.
Mon Jan 19 12:03:07 EST 2009 | Richard Hudson
Progress is slow but sure (or at least I hope it is sure...the welding is behind schedule and they didn't show up today :) )...
Blocking up the boat
Richard
Fri Jan 9 0:00:00 EST 2009, San Fernando, Buenos Aires, Argentina

To sand the hull and put new bottom paint on, the blocks that keep the boat upright need to be moved. Here, Senor Martinez, the yard foreman is hammering in a wedge after moving the block.

New Main Rudder
Richard
Thu Jan 8 0:00:00 EST 2009, San Fernando, Buenos Aires, Argentina

A new main rudder was built of stainless steel. It has been painted with primer (epoxy paint), and will later be painted over (with antifouling paint) and be the same color as the rest of the bottom of the hull. In the picture, the new rudder is about to be raised into place.

Sat Jan 24 4:22:24 EST 2009 | george Ray
Any progress on beefing up or replacing the auxiliary rudder?
Main Rudder
Richard
Wed Jan 7 0:00:00 EST 2009, San Fernando, Buenos Aires, Argentina

After removal, we were able to have a good look at the main rudder. It was built of plywood, covered by aluminum, attached to a stainless steel shaft, with an aluminum bearing fitted over it. The plywood is visible at the top of the rudder blade.

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