C19 Newbie Questions

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Pcbuss
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C19 Newbie Questions

Post by Pcbuss »

So my son and I are about to begin our C19 build. Question on building the jig.

Does everyone just use the 9mm marine ply for the bulkheads on the jig or do you use regular plywood and then just discard it after the flip?

Thanks,
Peter

Reid
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Re: C19 Newbie Questions

Post by Reid »

Peter,

Welcome and good luck on your build! Always nice to see father/son builds!

On a boat this big, I would cut temporary frames made from scrap plywood.

-Reid
Someone asked me, if I were stranded on a desert island what book would I bring... "How to Build a Boat."
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narfi
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Re: C19 Newbie Questions

Post by narfi »

I am building a different boat, but I think the process is the same.
I used cheap wood for the formers, because in the jig they need to be full size, but once built into the boat the bulkheads are much smaller.
It would take a lot of expensive plywood to cut full size formers, just to cut out most of them later once you are flipped and building the internal structure.

Hopefully that makes sense.

Here is an ugly mspaint image showing what I mean, the full size former and the 3 small pieces that make up the actual bulkhead.
former.png
former.png (8.55 KiB) Viewed 563 times
There are a couple of full size bulkheads, such as the motorwell bulkhead and often the farthest forward one, so you can make them out of expensive plywood to start with, but I didnt just because I was scared of waste and being my first big build didn't want to make any expensive mistakes.

Then once you are done with the outside of the hull, you can cutup your formers to make templates for the separate bulkhead pieces.

GuyP
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Re: C19 Newbie Questions

Post by GuyP »

Great diagram explanation Barfield.

GuyP
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Re: C19 Newbie Questions

Post by GuyP »

Don’t know how Barfield got there. I meant narfi. Oh spellcheck. What woyld I du witout it.

narfi
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Re: C19 Newbie Questions

Post by narfi »

hehe, I was trying to google it to understand a new term for me, but was coming up empty :P

Browndog
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Re: C19 Newbie Questions

Post by Browndog »

Many people use MDF for the temporary frames instead of plywood due to its stability, ease of cutting and economy.

fallguy1000
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Re: C19 Newbie Questions

Post by fallguy1000 »

I used pressboard - and prefer it. MDF likes to break out if not predrilled.
My boat build is here -------->

viewtopic.php?f=12&t=62495

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APLJaK
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Re: C19 Newbie Questions

Post by APLJaK »

There are many option. I built the CX19 (cabin version) and used the final marine ply for all of my stations except for the cabin bulkhead. This is because the bulkhead was cut shorter for construction to keep the hull lower to the ground. No reason not to use the marine ply, just make sure you are careful with your measurements.

You can see that I only cut the outside shape and left the inside solid for strength. This was not removed until the frames were removed and then replaced in the flipped hull. Although, I did cut a triangle out of one for something. Cant remember what it was, but it looks like a bow piece.
CX19 frame
CX19 frame
Then this picture shows the final frames trimmed reinstalled in the flipped hull. Here you can see the rebuilt cabin bulkhead (without doors, etc)
final frames reinstalled
final frames reinstalled

OneWayTraffic
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Re: C19 Newbie Questions

Post by OneWayTraffic »

I used marine ply for mine. If most of it will end up in the boat it’s a good choice. The molds do not need to be solid. You can build out of anything that has the right exterior shape

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