Saturday, December 25, 2010

Glassing the hull

Once the hull was free of sawdust I mixed up some epoxy, poured it into a paint tray and used the thin rollers that we bought at Pygmy to roll a thin saturation coat over the entire boat.
Then I went over all of it with a foam brush to smooth out any drips or bubbles. And let that dry overnight.
Then I lay the fiberglass cloth over the entire boat cutting it about 1-2 inches from the sheer seam and doing the little cut on the stern that is described in the manual. I was a bit worried about the cloth sliding as I rolled epoxy on it so I placed some weights on the top and used some scotch tape to attach the inside of the cloth to the inside of the boat. I probably didn't need to do this but it worked this way anyways.
Then I rolled epoxy over the cloth doing 4.5 oz. batches at a time. I used a squeegee to get all the excess epoxy off after the cloth was wetted. I have been very careful to not use too much epoxy in any step because I don't want to have to go through the scraping madness I had to previously.
You can see the difference between cloth with epoxy and without. It is completely see through. Once done with that I let it cure overnight.
Then I rolled a fill coat of epoxy (again making sure it is thin and smooth) over the entire boat. I placed a strip of fiberglass tape over the keel seam and used a bristle brush to wet the tape entirely with more epoxy. You can see the tape on the keel.
Then one more fill coat. After doing all this it really made the color of the wood pop out and I can definitely see a few scratches and discolorations under the fiberglass but it looks sweet overall.

Monday, December 20, 2010

Scraping, scraping and more scraping

And then it was time to scrape off all the excess epoxy from doing the seams. Oh man I wish we had been less messy. And thank you whoever invented the cabinet scraper. Shown below is how we scraped the epoxy off. It took me about a week (mostly because I had to work, too, and because I don't have robot arms). Kelly had to work more so had less time to scrape and she should be done soon.

We turned this...


into this...




...and finally to this. The cabinet scraper gets dull pretty easily and to sharpen it we used Todd Clippinger's method. This doesn't get "the finest" finish. But I have come to terms with the fact that my boat won't be the prettiest out there. I just want it to get me from Alaska to Orcas. And for that it doesn't need to look awesome.

After all the scraping, I did a little sanding, and used a moist sponge, a pin, and my lungs to get as much sawdust off as possible.

Epoxying and rounding the stems

The stems (the part of the keel seam that goes from the bow and stern towards the center of the keel until the edges of the panels meet) need to get a large bead of epoxy that is crazy thick with wood flour. Make sure it isn't too thick though, I made my first batch with too much wood flour and it caused only the more liquid elements of the mix to come out making it too thin and leaving a bunch of really thick epoxy stuck in the syringe. It should be thick enough though so that when you put it on the vertical stern seam it won't drip.
We let those large beads thicken and then wrapped some duct tape around the end of our file (so it reduced the scratching on the panel) and filed the bead flush with the panel on either side so it pretty much made a point. We then filed and sanded that bead round.

You can see the difference!

Thursday, December 9, 2010

Epoxying seams and clipping wires

Once all the seams were wired we put the boats on three benches (essentially sawhorses) and used a level, a long 2x4, and old national geographic magazines as shims to get everything level. Our boats didn't seem to twist too much, so we ran our hands along the inside and outside of the seams to make sure that the seams were making a smooth, even transition. We eyed the keel and made adjustments to make sure that there weren't any flat spots (that we could tell) and that it was straight. Then we epoxied the seams.
Epoxying the seams made me the most nervous of all. I mean drilling holes in the wood seemed scary and permanent, but this was worse. Once all the seams are epoxied that's pretty much it unless you really mess up and you have to go back and remove all the epoxy...that would be horrible.

So we mixed up some epoxy and put it in the supplied dental syringe and squirted a bead along all the seams except the very ends of the boat where it is too vertical. It was fairly messy...but we can scrape, file and sand all the excess epoxy drips later. Oh and the power went out hence the headlamps, we were a little worried about the epoxy getting too cold in the jugs and it did start to flow a bit slower but it seems to have turned out fine.


We waited 40 minutes then went back over each seam with a bead of wood flour-thickened epoxy. The seams were left to cure over night. We didn't realize this at the time, but any excess wood flour epoxy has to be taken all the way off (as opposed to clear) because it will show up after we glass the hull. Needless to say we could have probably been less messy and saved work down the line.

The next morning we tipped the hulls up on their sides to do the same process as above with the previously vertical end seams. We found that it was hard in the previous step to fully get the seam nearest the sheer line of the hull epoxied so we added more to that seam too. The epoxy was left to dry for 8 hours, and that evening we did the other side.

Here was another very nerve-wracking step:taking out the wires. In our heads we were imagining that we some how messed up the epoxy and as soon as we clipped the wires all of the panels would spring open again and we would have to start all over...this didn't happen. This was actually much easier than I thought it would be. I thought since the wires had a lot of epoxy on them seemingly attaching them to the wood that it would be very difficult. Since we clipped the wires while the epoxy was still a little "green" they came out relatively easily. I found the easiest way was to clip the center of the all the wires on the outside of the hull and peel the ends of the wires up on both sides then clip them flush with the boat. Then turn the hull over and pull the twisted end out with pliers. It was difficult to not mar the wood a little bit...we did the best we could.

And now we have all the wires out and are refilling the seams that didn't get enough epoxy in the first few steps with more wood flour-thickened epoxy.

Tuesday, December 7, 2010

Wiring the Hull

Now that the panels were drilled, it was time to wire them together! This step was both hugely satisfying and incredibly tedious, as we spent a good 9 hours twisting together tiny wires.

First we propped the boats up on boxes/crates/buckets while we wired the keel together. Pygmy recommended bending the wires over a scrap of wood to make a "staple," but we found that this made it harder to fit the wires through the holes. It seemed easier to just leave a curve in the wire, then pull it tight with pliers. After the keel was wired together we attached the bow, center, and stern frames to the keel seam. The frames generally flopped around and got in the way for the rest of the wiring process.


Once the keel was wired, it was time to attach the next panels. Before they could be wired, holes had to be drilled to the bottom of next panel, directly across from the holes that were pre-drilled (the day before) in the outside of the keel panel. We had initially thought that this would be tricky and involve lots of clamping and measuring, but quickly realized that we could just eyeball where the hole should go and (carefully) hold the panel while drilling. Drilling soon became a much less scary process.


After the corresponding holes were drilled, the chines were wired together, (twisted by hand first, then tightened with pliers once all the wires were in). This process was repeated for the rest of the hull panels. The keel and bow stems got extra wires added to help keep everything in place.

Once all panels were added and the chines wired together, it was time to (finally) wire the frames to the panels. This shaped-up the hull and made everything feel really solid. Our boats now looked like boats!! We also wired in the stern and bow wedges. Interestingly, the bow of Mike's boat was really narrow, and the wedge had to really be *wedged* in. My bow was much wider and I had to do a lot of wire tightening to get the panels up to where they needed to be.

We then hot-glued the frames into place, and got ready to flip the boats over and epoxy the seams.

Thursday, December 2, 2010

Drilling!

We had to drill holes the whole way down the edges of some of the panels every 6 inches. This made me kind of nervous...drilling holes in our new kayak panels? But I think it worked out. I ended up not using a jig as it mentions in the manual. I just measured every six inches and drew a dot 1/4 " away from the edge of the panel, then clamped them to the table and drilled away, we'll see if I was precise enough when we wire the hull together today. Since Kelly and I are building boats at the same time I just stacked all four like panels together and made sure they lined up well and then drilled all four at once. Saved a little bit of time.

Wednesday, December 1, 2010

Bevelling the shear seam


The cockpit reinforcement panels glued on nicely. They weren't cut exactly right so some of the reinforcement hung over the deck panel on a couple of them. But that was no big deal because we had to bevel the reinforcement panels on the edges anyway, which we did with our handy 4 in 1 rasp/file. We got the sides to as much of a 45 degree angle as we could.

Then we brought our project off the floor and onto tables! A very exciting moment. We clamped panels 4 and 5 (the outside deck panel and the top hull panel) to the table and used a plane, wood rasp and sand paper to bevel the entire edge of the panels where they would meet and create the shear seam (the seam where the deck meets the hull). We bevelled through the inside two plies of the plywood at a 45 degree angle (well as close as we could get to one).