Sunday, December 31, 2006
Saturday, December 30, 2006
Next we started squaring up the second hull for assembly following the same procedure as the first boat. By the end of the day we had the second boat all glued up and curing so that tomorrow we could glue the bottom on the second boat and begin applying fiberglass tape to the inside of the first hull.
We also started shaping the amas to the rough side view shape. Lots more work to do on the amas. Don't forget to see the time lapse video from thursday.
Once everything was curing on the tops and bottoms, finalizing work started on bulkheads for boat 1. This was one of the most frustrating parts of the build because we had to make sure that the whole boat was more or less in a straight line. We eventually solved the problem by adding diagonal cross braces for each section of the hull. At the end of the day boat 1 was curing with the bulkheads and stem in place.
To see all of our work on the bulkheads check out our time lapse video...cool camera Alan! A picture was taken every 2.5 minutes.
Wednesday, December 27, 2006
To get the desired 1" of foam we needed on either side of the existing foam-over-plywood outriggers, we ripped the scrap foam on the table saw. This was fast and effective, leaving us with straight 'planks' of foam that we could easily glue in place. The only downside to this kind of cutting is the ultrafine, static-generating pink dust that can easily make a room filling cloud. It sticks in your body hair and eyelashes. We taped cardboard around the legs of our saw and rigged a shop-vac as a dust collector. Otherwise, the dust that coated the table saw controls would have coated the room...
With more polyurethane (off brand Gorilla) glue, we adhered these last sections. Each side of the outriggers got another 4 foam segments. With plenty of masking tape and weight, we laid up one side and went to lunch. After consuming about a pound and a half of tuna, a jar of pickle relish, a small box of alfalfa sprouts, and four fresh sandwich rolls ($9), we flipped them over and glued the other side. Here's one last shot of the drying amas...
With luck we'll begin shaping before the week is out! Thanks for watching us!
Saturday, December 23, 2006
Work began this morning with chines and gunwales that had cured over night. We needed to rip them to the correct dimensions and build a feather board jig for the table saw, in order to do this accurately.
With the chines and gunwales cut to the proper dimensions, we used a spacing jig to set them onto the side panels and screwed them into place. Then we removed the screws to apply epoxy and reassembled to a perfect fit.
Here are all four side panels with gunwales and chines curing. We are also starting to think about the final bulkhead placement and beveling at this point.
Much thanks to Katherine, Matt and Chris's sister who spent most of the day with us in the shop volunteering to help us work. She proved herself to be very handy with a saw. She also managed to keep us on task, reminding us of what we needed to get done.
We decided to have one last look at the bulkhead placement and with Mike as the model, we settled on a bulkhead spacing that maximized leg room without much deviation from the plans. The boat is pretty deep; we'll need tallish seats to clear the deck. In this picture, Mike is sitting on a pair of paint cans and a short stack of bricks.
After adding some plywood gussets to the center bulkheads, we planed, sanded, and marked up the bulkheads and started notching them for their final position in the hull.
The bulkheads fit without much difficulty and it started getting exciting. Here, Chris is making some fine adjustments to a bulkhead notch for a perfect fit.
With all the notches finished, the sides went together very quickly. We used temporary wood screws with large washers (to protect the side panel surface) to attach the bulkheads to the side panels for a dry fit of the hull before epoxying.
The bulkheads fit right into place. YES!!!
Here are a couple of pictures during the bulkhead/side-panel dry fitting.
Hmm, how is the fit Matt? We left 54 inches of space between bulkheads for each cockpit. This gives the occupant enough room for to recline into a very comfortable position. I think Chris is asleep. shhhh
We also finished laminating all of the three inch foam onto the ama frames. We still have to laminate a one inch layer to the outside to get the full width we want. Here, Chris is spreading the polyurethane glue onto the ama before laminating it to the foam.
Mike and Matt work on weighing down the ama to cure under compression. Since the polyurethane glue is an expanding type, the pieces have to be well clamped to avoid gappy joints.
Our stack of finished amas with foam attached. These still need their outer layer, and final shaping into a circular cross-section. The whole team is planning to meet back up after Christmas. Until then, Matt, Chris, and Mike will be working more on the second hull and shaping the amas out of the foam. I will be going back to Chapel Hill for some family time.
Friday, December 22, 2006
Back from a long day of work at the warehouse today (Thursday). We got to work laying up the rest of the side panels so they could cure during the day and then Chris and Mike went in search of some foam to use for the ama construction. Meanwhile, Matt and I started work on the gunwales and chines scarfing and gluing long hardwood boards together that will make up the stringers.
Here are the gunwales and chines curing under compression. The joints overlap at a shallow angle similar to the scarf joints used in the side panels to maximize the glued surface area and balance the normal and shear loads in the joint.
With Mike and Chris back with the foam, we started working on cutting strips to laminate to the plywood panels to make up the structure of the amas that will later be shaped to the final ama shape and then fiberglassed. We used expanding polyurethane glue to laminate the foam to the plywood, it for the application.
While the amas were drying we got to work assembling the bulkhead structure. Each plywood bulkhead has a hardwood perimeter around it that aids in attaching the sides, bottom and deck. Here is the number 2 bulkhead with the hardwood glued in place. The end of day two we managed to finish all of the bulkheads, all of the chines and gunwales and all of the side panels. A very long day but very rewarding.
The team and vehicles are relocated for now in Charlotte, NC and we have set up camp in the warehouse attached to Hubert Whitlock Builders, a local contractor owned by Chris and Matt's family. The large heated space is ideal and much progress has been made. Here we are on Wednesday after unloading the trailer exited to get some real work done. Read on!
The view from above in the new workspace showing our side panels laid out for labeling as we prepare to make that scarf joints and join the side panel pieces together. It was a big help to be able to spread everything out on the floor and organize all of our parts.
The finished scarf joints ready for joining. The scarf joint making jig worked flawlessly after the 5th or 6th try on some scrap plywood getting everything lined up juuuuust right. The joint was made with thickend epoxy and compressed with weights.
At the end of day one we have half of the scarf joints laid up and curing and our four ama sections laid up on the far left one on top of the other. The ama pieces were joined with butt joints and sandwiched between a layer of 4 inch wide strip of 8oz fiberglass cut on the bias top and bottom. We were a little short on heavy things so everything in the room turned into a weight to help compress the joints. All in all, a good first day.
Sunday, December 17, 2006
This jig was made to cut the scarf joints into the hull side panels that require a very low angle cut for making the joint.
Here is the shop bot in action cutting out the ama panels. We were able to cut all of the panels for all 4 amas out of one sheet of plywood!
Wednesday, December 13, 2006
Now the only major things left to buy are Epoxy, masts, blue foam, and all of our required equipment; we hope to get things taken care of before we break for the semester. Speaking of the break, the current plan is to move everything to Charlotte and go on a 2-3 week building blitz so the majority of the canoes are done before school starts up again. Look for more updates in the coming weeks, we hope to have great progress.