Thursday, December 23, 2010

December 23, 2010

New clamp boards are in place on the port side. Upper and lower with staggered scarfs about 20 feet long spanning from the lazarette to the engine room. Epoxied and screwed in place.

Bulkhead sanded and primed. The tank pad was made to bring the forward end of the tank up a 3/4 to allow the tank to run dry when empty. (The fittings are on the inboard face of the tank so it can be slid around.) The tanks are set outboard of the shaft alleys so they can be inspected and serviced.

Battery boxes are in place, engine room bulkhead is primed.

New absorbed glass mat 8D batteries. These are heavier than wet cell 8D's. Fun to tote around!

New roof beams for cabin roof overhang. We laminated full 16 foot 1 x4 pine, C and better... cherry picked for no knots and straight grain. We make the form out of 2x8's and skin the top with plywood. Then stick packing tape to the forms top, and align the first beam to the outside edge, and use blocks of the same dimensions to space them. Each layer is screwed in a staggered pattern, with epoxy and cabosil mixed to ketchup consistency. The beam is kept square by pushing or pulling the twist out of each layer until the face is smooth. On narrower pieces, we rip them all without changing the setting on the table saw so they are identical width. The boards are sanded on both faces, and set on the jig with one end butted to the jig. The jig is marked for centerline, and the beams are marked afterward. We are making 16 foot beams, but only need around 14 so we can cut off the excess, and make certain the ends of the finished beams have tight glue lines. The ends of laminations often fight you when pulling them down.

Tight working conditions, but we make it work... We are making 8 total, so that we can clear span the overhang and put a decent sized dinghy on top without springing the beams. The sawn ones in the old roof were doubled 2x material, this will be much stronger as several of the sawn beams had cracked at the grain run out in the ends.

We'll be be working on the starboard side clamp boards, and tank platforms after Christmas. The port fuel tank will be filled with fuel, to give an average weight to the aft end of the boat. Together when full the tanks will weigh just under 10k pounds, which means the aft end of the boat is going to go down in the water quite a bit. Since we are doing all of this floating, we have to do a good bit of weight shifting and forward thinking to make sure things look right. All this fuel talk is so that we can build the aft wall of the cabin, and build it plumb.

Thats all for now,


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