VG23 New Build

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VT_Jeff
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Joined: Fri Oct 25, 2019 6:32 pm
Location: vermont

Re: VG23 New Build

Post by VT_Jeff »

Great looking work and congrats on all the new skills youre racking up, thats one of the best parts of this business! The sailing courses sound great too! I looked into doing some courses so i could credit-card captain in the carribean, but then i got the quote for the boat rental and realized i didnt have the right credit card!

Curious why you want to run your raw water intake through the keel. The 3-4 on my sailboat are all through the hull bottom basically under their point of use(galley sink/head sink/head/engine cooling.....i think thats it). Im going to guess you want it low so it will work with the rail-down?


There are only two seasons in Vermont: boating season, and boat-building season.

Completed Paul Butler 14' Clark Fork Drifter
Completed Jacques Mertens FS14LS + 10%, Build Thread
Started Iain Oughtred Tammie Norrie

mhd
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Location: New Mexico

Re: VG23 New Build

Post by mhd »

VT_Jeff wrote: Mon Nov 21, 2022 9:31 pm Great looking work and congrats on all the new skills youre racking up, thats one of the best parts of this business! The sailing courses sound great too! I looked into doing some courses so i could credit-card captain in the carribean, but then i got the quote for the boat rental and realized i didnt have the right credit card!

Curious why you want to run your raw water intake through the keel. The 3-4 on my sailboat are all through the hull bottom basically under their point of use(galley sink/head sink/head/engine cooling.....i think thats it). Im going to guess you want it low so it will work with the rail-down?
Thanks! Yes, the courses weren't cheap, but we both enjoyed the experience. To be fair, just one or two of the courses would have been enough for what we wanted, but we were still learning and practicing things each day. And we visited some places we'd never been before. Now we want to get the build finished and put our limited knowledge into practice before we've forgotten everything...

As for the water intake, I figured the centreboard (CB) case was already one hole in the boat, so why not use that - no need for a sea-cock. The galley on the VG23 is right next to the CB case so it will be a short pipe run. And unless the intake pipe springs a leak (3/4" OD braided) water can't get into the cabin at any point - I've run the pipe to come out of the top of the CB case and that is above the waterline - I'll fit some kind of rubber grommet or might use silicone sealant to make it reasonably watertight just to be sure. We'll then use a hand pump next to the galley sink to pump up as needed.

Up to now I'm realising that boat building is really an exercise in project management, along with everything else. Trying to think of each part of the build, and also the complete final design, and hold it all in your head at the same time. I'm really trying not to make any decisions now that somehow make life a pain aboard in future (e.g. things in the wrong place that can't be moved without a lot of future work). But of course I'm still making my own mistakes along the way - biggest one up to now was cutting the CB case inspection hatch hole in the wrong place. Just 1" too far to the right and as a result once it was sealed up I wouldn't have been able to reach/change/replace the cheek block that is in there to lift the CB itself. I'd measured it three times prior to cutting too so only myself to blame. Not a major issue but I'm glad I caught it.

Mostly small mistakes up to now, but there are bound to be some bigger ones before I'm done...

Cheers,

Mick
Completed: FB11 (Designer Evan Gatehouse)
Current Build: VG23 (Designer Jacques Mertens)

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VT_Jeff
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Joined: Fri Oct 25, 2019 6:32 pm
Location: vermont

Re: VG23 New Build

Post by VT_Jeff »

Now I get it. Very clever!

I cant imagine the mental gymnastics of planning/building your own cruising boat. I suspect fallguy has a pretty good idea though!
There are only two seasons in Vermont: boating season, and boat-building season.

Completed Paul Butler 14' Clark Fork Drifter
Completed Jacques Mertens FS14LS + 10%, Build Thread
Started Iain Oughtred Tammie Norrie

mhd
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Re: VG23 New Build

Post by mhd »

VT_Jeff wrote: Mon Nov 21, 2022 11:19 pm Now I get it. Very clever!

I cant imagine the mental gymnastics of planning/building your own cruising boat. I suspect fallguy has a pretty good idea though!
Yeah, I'm trying to read/learn a lot of what people have done before. But also to trust myself and not be scared to go my own way or make my own mistakes when the situation arises.

I'm constantly impressed by the skill/time/patience/dedication some people have - some of the boats on here and elsewhere are truly works of art.

Mick
Completed: FB11 (Designer Evan Gatehouse)
Current Build: VG23 (Designer Jacques Mertens)

mhd
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Re: VG23 New Build

Post by mhd »

Drafted out a very basic 12V system using two 85 Ah batteries, an estimated 200W of solar power, and various different components for the VG23. This will probably get modified at some point but a good place to start. Fans/low-power heater/cooler-plate/lights/navigation/radio.

Since the boat will only have a temporary outboard (so I can't ground to that) and no keel bolts or other significant external metal, and I don't want numerous circuits with floating potentials, I decided to make a common ground from pure copper plate below the waterline inside the centreboard case (but easily removable). This way, during normal use, everything will have a common negative voltage (that of the surrounding seawater). The ground plate connection can/will be disconnected for mooring in any marinas where other boats might be around too, all at a different potential. I currently don't intend to use shore power.

I made a similar (simpler) system on the Jeep that we use when camping - that does work using a floating potential and doesn't have a common ground. I wanted the common ground for the boat to keep all the DC components at the same potential and avoid any possible sparking - never a good idea on a boat.

There appears to be a *lot* of voodoo concerning electrical system design for boats, and the issue of grounding, and particularly grounding for lightning. I haven't decided which way we might go on that, and whether we may install some kind of lightning protection system. But doing it this way the entire 12V onboard DC system will be completely separate from any possible lightning protection system that we might install in future(which will need its own more serious external grounding). I haven't sketched out how to deal with grounding the VHF on the diagram here either but will get to that before too long I'm sure.

Image

Any battery recommendations? I've been looking at the Trojan deep-cycle batteries but they don't come cheap!!!

Mick
Completed: FB11 (Designer Evan Gatehouse)
Current Build: VG23 (Designer Jacques Mertens)

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