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Copying a 31 Bertram in Quepos Costa Rica

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Copying a 31 Bertram in Quepos Costa Rica

Old 09-15-2018, 07:49 PM
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On the Bertram 38, you could work a deal with the mold owner, that would be an advantage to both of you. If he paid for all or most of the materials, you could layup a hull for him, and in exchange you would be the new owner of the molds. This would be a win-win.

As to engines, buying a truck motor and separately obtaining the external parts would be a very expensive way to get new engines. By far the most practical method is to buy takeout engines from a marine shop. There are plenty of these available, sometimes even from manufacturers. Henriques Yachts in NJ often will completely refurbish a used Henriques, and then sells the used motors to commercial fishermen.
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Old 10-03-2018, 11:04 PM
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Ok, this post is going to take a left turn. I got the 40 footer from the marina. Monday I signed away my life to the marina for this thing! I have until April to pay off everything this boat owes to the marina for being there the last two years and making no payments. So as soon as we signed the paperwork, we jumped in the boat and pulled the boat out of the water. There was nasty current in the estuary in the first picture, I hadn't driven a twin diesel boat, all mine are singles, so it was a trail by fire I don't know if I like the keel on this thing, I always imagined they would turn better, but either way, we made it.

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So we take it out and then we got on it right away and chopped the tower down. I didn't see the point of leaving the super high tower (think lightning rod) on the boat, so we decided we will just leave the fly bridge. Here's some process shots.

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And then we parked it under the big roof we put up two weeks ago. The roof worked out perfectly, it fits right in there with the flybridge and roof, and we can completely finish the rest of the boat in the SHADE! I love shade, and no rain. This is going to be easy!

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Old 10-03-2018, 11:05 PM
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Alright, so here is the plan. The boat looks old, and we can do better. So what the plan is, we are going to copy the windows on a friends boat, called the Pescadora. it's a 40 foot Ronin, and it has the same "hat" style fly bridge, so i think I can make mine look almost identical to this one

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Then I hate the back of the boat too. It has an AC and fridge instead of rear windows. I wish I had pictures. But when I'm done, I want a pair of nice windows, a big wide door in the midle, and all plexiglass in the back so that from inside we can see what's going on in the fishing area. And then I want two ice chests that double as seats right below the window. I want something like this, but without the two extra chairs.



And then I want to make a hard top out of DivinyCell. And then the most fun is I want to add a bunch of LED's. I'm thinking green LED's, but I'll probably buy adjustable LED's so we can change if it gets boring. The marina wants us to do something cool looking and they are going to park the boat right in front of the restaurants, that was part of the way they gave it to me. I love the green LED's on the bottom pic.

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Old 10-03-2018, 11:07 PM
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I'm in a first aid class this week, so we aren't working as fast as I'd like. This was Tuesday, we just got some hammers and a pair of sawzall's and started taking out the old stuff.

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This was Monday while we were waiting on the paperwork to get the boat out of the marina. That was the rotten kitchen. The roof leaks and it was nasty so it's all got to go.

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Old 10-03-2018, 11:08 PM
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And here's some pictures from Wednesday (today). We got all the windows out. This was really hard honestly, all the frames had corroded screws with weird square heads, and it was a nightmare getting them out. And then they were all glued in. It was just tough.

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And then the reason the inside of the cabin was so nasty is there was a water leak in the floor of the flybridge. On striping down the interior, I learned (and also larry (tht member who has helped me a ton) told me) that the cabin is all balsa cored. i thought it was completely rotten, but there were only three smaller areas that were rotten. We will get all that sanded tomorrow and put some divinycell in the hole hopefully tomorrow. Here are some pictures. Yes I cut the back wall of the cabin halfway out....

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A good surprise. I was going to rip out the whole back wall of the cabin, but after I started cutting I found out that the back wall is foam cored. I am blown away that Hatteras was that far in front of the foam cored tech, this has to be one of the first foam cored boats. Larry (my THT hatteras guide) also let me know the bulkheads are probably cored too. This boat is actually going to be fairly light for it's size. Here is a picture of when I discovered the back wall was divinycell.

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And I wish I had a before picture. We bulldozed the whole upstairs. It had a 1 inch plywood console with a trillion switches and things, and I don't know that any of them worked. I am going to simplify this alot. For as impressed as I have been with the rest of the build, I don't know why they put a 1000 pound console upstairs with uncured plywood that absorbed a ton of water. There were cable everywhere, half of them hooked up half of them rotten. It's easier to just start over. Going to make a cool console upstairs, all foam cored and just what I need without all the switches and lights. Don't have a before shot, but this is the after.

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Well that was the first two days of work. My last day of class is tomorrow (it's been a one month course), so next week it's going to look like we supercharged the build. I'm feeling the pressure so we are going to get this thing together quickly!
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Old 10-04-2018, 01:08 AM
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Glass in the windshields. You will thank me later.
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Old 10-04-2018, 01:26 AM
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Nice one John..... Left turn indeed!
And agreed, glass the front screens in, a hatch is fine to get a breeze.

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Old 10-04-2018, 03:53 AM
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Great project, always impressed with the rapid de construction.
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Old 10-04-2018, 04:12 AM
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You are the man! Probably a legend the small kids on the island talk about. Love your build threads. Rag’s
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Old 10-04-2018, 07:24 AM
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Love it!
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Old 10-04-2018, 07:32 AM
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You’re keeping both builds in this thread? Want to make sure I follow if not.
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Old 10-04-2018, 07:38 AM
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^^ x2 - All the boat building will be here John ?
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Old 10-04-2018, 07:52 AM
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You could fill a new boat building sub forum all by yourself!! :-)
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Old 10-04-2018, 08:07 AM
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Yeah, I'm just going to keep posting here. We are using the windshield aluminum frames as forms to cut the DivinyCell today, so it'll be foamed cored and glassed over. Hopefully by the end of the day, but we have rain blowing in sideways right now. I gave everybody the morning off, usually rain here rarely lasts more than a few hours, yesterday we had weird morning rain too. The world is coming to an end, we used to only get night rain here... Or is it that I want to start glassing stuff. It's not getting wet in the cabin though, so we are grinding and replacing the rotten balsa. About to head off to my LAST day of my one month captain refresher course, and then Friday I can start working on this thing full time. I'll try to post some more pictures tomorrow night! Hopefully of some progress and a solid front of the cabin!
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Old 10-04-2018, 03:02 PM
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Less weight up top should help stability, too, John.
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Old 10-04-2018, 03:43 PM
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Originally Posted by cuzn dave View Post
Less weight up top should help stability, too, John.
For sure. Also the tower is 100 percent full of water, so that will change the center of gravity as well now that we took most of the tower off and drilled holes in the rest.
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Old 10-04-2018, 05:22 PM
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I love the keep it simple ethic. Keep it up. You have a great labor force. Light construction with new wiring... Money.
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Old 10-04-2018, 06:55 PM
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Originally Posted by Tortuga99 View Post
I love the keep it simple ethic. Keep it up. You have a great labor force. Light construction with new wiring... Money.
Yeah, less things to go wrong. I mean boats are not the easiest to keep running....
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Old 10-04-2018, 07:06 PM
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john, my 1972 hatteras has a foam cored transom, but they used balsa in the decks
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Old 10-05-2018, 09:04 AM
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John, when installing terminals on wire, do you crimp, solder, and heat shrink? Usually this pretty much eliminates corrosion in the wire. Also, after a panel is wired, you can spray clear woodworking type of sealer over the back of the panel to reduce green corrosion.
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