Thursday, January 6, 2011

January 6th 2010

This week we finished putting the pad under the starboard side fuel tank, and slid the tank in place securing it with boards symmetrical to the port side.

We put in 2 new frames in the engine room on the starboard side and put the finishing touches on a repair to a port side knee.

The battery boxes are in final primer, the top lids and hinges are awaiting installation.

We had a break in the weather, a short warm spell that meant work on the bow toe rail started back up... We've been pulling weighted strings across the toe rail to get the tops in line to each other. We've been squaring the inside faces to the deck with blocks of wood, and using 4.5 inch grinders with 36 grit grinding disks. We've also made little plywood squares to see that the top is square to the sides. We've also wrapped long skinny battens of wood around the outside curve and pushing them to the inside to see if there are highs and lows in the curve.

Lastly, we've power planed the bow anchor platform flat, which accentuates the curve of the deck... seeing as Noel comes to a point quite quickly she doesn't appear to have any camber in her deck at the bow.

We'll be adding a layer or two of 3/4 plywood tapered out to nothing over the first 10-12 feet of the bow, to reduce the visual effect of how quickly it tapers down. There is a bit of an illusion that her bow runs down hill from 5 or 6 feet aft the stem, and we are going to lessen this...

This is called an extended sheer line. The sheer line is the curve where the deck meets the hull as seen in the side profile. Since the bow goes from 15 or so feet wide, to the stem which is about 6 inches wide at the face over the course of 20 feet, even a straight sheer with no curve running up hill 3/4 inch to 1 inch per foot looks like it runs down hill over the last 8 to 10 feet.

An extended sheer bumps this forward 8 to 10 feet of deck, in this case the toe rail as that is the visual element that defines the line on this boat... upwards greater than the 3/4 to 1 inch per foot. Basically raising where the deck, or toe rail hits the stem 3 or 4 inches beyond what a design plan, or side profile 2d drawing would show.

What this does is tricks your eye so it doesn't see the down hill slope. Look at some boats from a side view and it becomes quickly apparent which ones have a flat sheer, and which have an extended sheer. Since Noel has a bit of powder horn, where she quickly gains elevation in her deck around 25 feet aft the stem, (3 inches over 8 feet...) her sheer line already has some lumps and bumps that either need to be smoothed out or accentuated.


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