Thread: GIS Yawl

Hey Simon, they are there now. I am suspicious of free image hosting.com

They may take a bit for you computer to load.

I think the pics are back now.

Or the ones on the previous page are.

Hey - I've been travelling ... who is this Goat for Clint? Is it the kit for John?

MIK

It is both MIK! Unfortunately, I need to put the hull to the side (in a friend's barn 45 min away) while I do other things. But I still get to play with the Goat next week and then move on. My plan is to go gangbusters on the boat after the Wooden Boat Show in late June and have the GIS at the Small Reach Regatta to "spank some booty", so to speak.

Clint

That WILL be fun.

MIK

WEDNESDAY, FEBRUARY 10, 2010

My own build of the GIS continues until this Friday when kits for the boat go out, the patterns for which are based on this build. The assembly of the sides is quite typical of a self-jigging skiff, with side panels wrapped around bulkheads, glued, and carefully leveled to prevent twist in the hull.

Before assembly I epoxy coated and scrape-filled the plywood.



I approached this hull differently because of the twist in the side panel as it wraps around the first bulkhead, developing compound curvature as it fairs into the stem. Putting the whole thing together in one glue-up session, solo, is a workout. But boy was it fun. I've built a few dozen boats like this; this skiff was the most fun to assemble.

I started by glueing and screwing the panels to the first then second bulkheads, the place where the compound curvature in the panel is centered.





The stem was fastened then the hull was zipped up from the midship frame aft. It is now glued with no twist in the hull fore-to-aft.





Sadly, on Friday I put the hull in a friends barn for a few months. The barn is a Goat barn, literally. I hope they "don't get my Goat"!

(I am trying Photobucket....let me know if the pictures are too big or slow to load or whatever, thanks.)

Looking good. Your assembly sequence makes a lot of sense for a single hand operation. Too bad you have to stop. That means I won't be able to mooch any more GIS tips off ya before mine gets done.

Are you planning something fancy for the aft compartment access cover? The opening in BHD#4 looks oval. I'm ready to cut the access holes in my bulkheads but am not too crazy about the look of the plastic deck lids.

Nice build sequence, Clint.

The pics worked fine for me.

I'm going with a single oval wooden hatch in the aft bulkhead.

I used a line to bend in the aft end of the planks while putting the panel to the first couple bhd's. You can just see the black line. Tie it with a slippery half hitch so you can use it as a lever to pull the panels in as you put each successive bulkhead into place.

You can try to keep mooching, I may just be too busy with the other project and worrying about the Goat in the "Goat" barn. I may actually try to find another place...

Hi Clint

Good pics Clint. However, they are a bit small. can you try uploading bigger ones so that they can be clicked and the bigger image shows? When I upload mine the forum seems to do this automatically.

I was considering a similar process myself as my assembly will be single handed. Good to know it works OK, so thanks for this post and the pics. The only difference being I was considering pulling in the bow with 3 heavy duty nylon cable ties (not the generic plastic sort), and then applying permanent screws, releasing the cable ties when the epoxy has cured. Cable ties can provide enormous leverage. Would this make things any easier do you think?

Bruce, if they are very, very long yes that would help. Long so they can be threaded and the zip started so when you have to bring the bow together (after attached bhd 1 + 2) you can pull on the ties. It takes some muscle and my large quick grips helped. The zip ties would help it align while you get the screws in there....the stem comes together at the bottom first...that zip ties doesn't need to be super long, the one at the top does because the panels are splayed open there as you attached the first 2 bhds.

Originally Posted by Compass Project

Before assembly I epoxy coated and scrape-filled the plywood.

What is scrape-filling and why do you do it?

Originally Posted by john goodman

What is scrape-filling and why do you do it?

Applying poxy with a scraper, similar to this
[ame="http://www.youtube.com/watch?v=13Xna-uKWmg&feature=related"]YouTube- Broadcast Yourself.[/ame]

Well, that sure beats the heck out of using old credit cards for spreading epoxy! Of course, I didn't try coating entire sheets...

Using a brush to apply epoxy coatings is about the most wasteful way of doing it. It applies the epoxy in elongated piles and doesn't really spread it out evenly, which is the point, especially considering the cost and effort.

I like using a squeegee, which is seen in the video, but a plastic body filler spreader (applicator) works well too. In the video he (or a really ugly she) used a plastic spreader to catch the excess at the edges and put it back on the surface. With flat blade type of applicators, you can apply very controlled, thin layers of goo and quickly too. If you work in weather like I do (hotter then a hooker outside a Ford automotive assembly plant on pay day) then you can understand why it's important to work quick.

A brush should only be used in areas where there's really not much else that can reach.

Foam rollers are almost as good at depositing a uniform surface as blade type spreaders. They have a tendency to store a surprising amount of epoxy in the roller itself, which seems wasteful. Plus you have to tip off to kill the bubbles. If I want to bulk up epoxy thickness quickly, I'll use a roller. The roller isn't nearly as fast as a spreader. I can do a whole sheet of plywood in about a minute with a spreader, with maybe another couple of minutes to "clean it up".