Warren's Build Log, CAN 573

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Re: Warren's Build Log, CAN 573

Postby Warren Nethercote » Fri Mar 23, 2018 9:47 pm

You have seen this sequence before. Stiffening the next cockpit sole panel (this time with openings for hatches) and then gluing it down. Moving towards the bow, albeit slowly.

(But we have a new page on the build log)
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Warren Nethercote
Boutilier's Pt, Nova Scotia
Build License 573
Build log: viewtopic.php?f=3&t=364
Warren Nethercote
 
Posts: 202
Joined: Sat Apr 25, 2015 2:11 am

Re: Warren's Build Log, CAN 573

Postby monsters inc » Sat Mar 24, 2018 1:39 am

Question, are you screwing down the deck panels,then leaving the fasteners? Or removing them after the epoxy sets? I suspect the latter, but that is a lot of holes to fill ! Nice work
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Re: Warren's Build Log, CAN 573

Postby Warren Nethercote » Sat Mar 24, 2018 1:47 pm

Yes, I am removing the screws, which are just hardware store cad-plated ones. You can see, right aft, where I have already started filling holes with left-over filleting mix. Not the best stuff for filling holes, because it doesn't sand easily, but why waste already-mixed epoxy? I did think about just using weights to hold the deck down, but screws seemed easier to manage, if a bit more painful afterwards.
Warren Nethercote
Boutilier's Pt, Nova Scotia
Build License 573
Build log: viewtopic.php?f=3&t=364
Warren Nethercote
 
Posts: 202
Joined: Sat Apr 25, 2015 2:11 am

Re: Warren's Build Log, CAN 573

Postby Warren Nethercote » Thu Mar 29, 2018 9:56 pm

Perfectionists die unhappy, or is that rationalization?

Moving towards the bow, checking the geometry of the chain plate backing blocks (measuring to the chain plate location from the stem and from the mast step) revealed asymmetry. No great surprise. It is a consequence of construction choices.

I should have made the frames out of 12mm plywood like Leon, or put doublers all the way around the frames, to avoid frame distortion when springing the gunwales around the upside-down form. The greatest stress on the gunwales was in the frame 110 area. The solution to the asymmetry is a straightforward kluge: make the port-side doubler thicker, and the two chain-plates can be located symmetrically. Next up is to finish taping the cant frame that supports the chain plates. The chain plates themselves will be made of remnants of 3/16" x 3" SS316 flat bar from runner building projects for my DN. Thicker and heavier than need be but the price is right.
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Warren Nethercote
Boutilier's Pt, Nova Scotia
Build License 573
Build log: viewtopic.php?f=3&t=364
Warren Nethercote
 
Posts: 202
Joined: Sat Apr 25, 2015 2:11 am

Re: Warren's Build Log, CAN 573

Postby Warren Nethercote » Thu Apr 05, 2018 12:36 am

I am reminded of 'Stuck in the Middle (with You)', but I am making progress. Today I knocked out some chain plates from 3/16 inch thick SS316 using Kevin's drawing as guidance. My chain plates are wider than Kevin's because I had three inch wide stock (from a DN runner blade project), and the backing plates are narrower, but longer, because I had three inch wide stock (split down the middle). Four 5/16th bolts instead of three, just because.

The dry-fitting was successful, largely courtesy of a junky angle-drill that I bought on sale years ago, but never needed until now. Fitting the backing plate is picky to the extreme, with very limited clearance. I was tempted to use 1/4 inch stock for the backing plates and tap them, but the simplicity of nuts and bolts won the day, despite the aggravation.

Oh, when all was said and done I realized that the chain plates were really designed for a boat with a cabin and less deck camber than the PDX, but it matters not. Or so I maintain.
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Warren Nethercote
Boutilier's Pt, Nova Scotia
Build License 573
Build log: viewtopic.php?f=3&t=364
Warren Nethercote
 
Posts: 202
Joined: Sat Apr 25, 2015 2:11 am

Re: Warren's Build Log, CAN 573

Postby Warren Nethercote » Fri Apr 06, 2018 4:42 pm

While I'm on a roll, more metal work .....

I thought about finally learning how to use Draft Sight and have the parts water-jet cut, but it was quicker to just draw it the old way and do it with hand tools. Unless I screw up, this is a one-off.

Obviously, fit-up and welding still to come.
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Warren Nethercote
Boutilier's Pt, Nova Scotia
Build License 573
Build log: viewtopic.php?f=3&t=364
Warren Nethercote
 
Posts: 202
Joined: Sat Apr 25, 2015 2:11 am

Re: Warren's Build Log, CAN 573

Postby Warren Nethercote » Fri Apr 06, 2018 8:51 pm

And fit-up. Monday I will chase down a welder. I'm not contemplating getting a cylinder of tri-mix just to do about 8 inches of welding.
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Warren Nethercote
Boutilier's Pt, Nova Scotia
Build License 573
Build log: viewtopic.php?f=3&t=364
Warren Nethercote
 
Posts: 202
Joined: Sat Apr 25, 2015 2:11 am

Re: Warren's Build Log, CAN 573

Postby Warren Nethercote » Sun Apr 08, 2018 10:02 pm

Continuing gradual progress.

I will be putting berth flats in the boat between frames 53.5 and 124, not for sleeping but for sail storage. Feeding rolled sails through the cockpit hatches and past the bare frames would be like pushing on a rope. Got just about all the stiffeners on the frames to give a good gluing surface for the berth flats.

Continued taping chines (9 oz. biax carbon fibre), the centreline gore (15 oz Gougeon biax glassfibre), and the inboard face of the stem (12 oz uni carbon fibre leftovers from my DN runners, oriented across the joint) before gluing up a breasthook for the stem. With my stemhead fitting requiring a slot in the deck and stem, a breasthook seems a wise idea to keep everything together.
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Warren Nethercote
Boutilier's Pt, Nova Scotia
Build License 573
Build log: viewtopic.php?f=3&t=364
Warren Nethercote
 
Posts: 202
Joined: Sat Apr 25, 2015 2:11 am

Re: Warren's Build Log, CAN 573

Postby Warren Nethercote » Wed Apr 11, 2018 12:00 am

Welded-up stemhead fitting. Pardon the fuzzy photo, but you get the idea. The sketch (not a drawing, with missing views and incomplete dimensioning) was was done full size, largely to allow me to cut out the piece parts, which don't exactly follow the sketch if I am honest.

The welder's work is a lot better than I would have done, so my reluctance to buy tri-mix welding gas was not just cost avoidance.
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Warren Nethercote
Boutilier's Pt, Nova Scotia
Build License 573
Build log: viewtopic.php?f=3&t=364
Warren Nethercote
 
Posts: 202
Joined: Sat Apr 25, 2015 2:11 am

Re: Warren's Build Log, CAN 573

Postby Warren Nethercote » Fri Apr 13, 2018 9:09 pm

Fitting the berth flats and taking advantage of traditional use of 'storey sticks' (there are undoubtedly other names) to reduce time and aggravation.
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Warren Nethercote
Boutilier's Pt, Nova Scotia
Build License 573
Build log: viewtopic.php?f=3&t=364
Warren Nethercote
 
Posts: 202
Joined: Sat Apr 25, 2015 2:11 am

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