Sunday, July 18, 2010

Getting the Right Rake



Atkin specifies Valgerda's mast should rake five inches in 10 feet, that's one in 24 or about two degrees. You don't have to hang around me long before you discover that I'm not a whiz at math or even simple arithmetic. Finding where Ravn's mast step needed to be had me scratching my head for a while. Finally, I took an eight-foot two-by-two, stuck it through the mast partner and marked it. Then I measured five feet up from that mark and made another mark. I made a block two and a half inches long and found another stick longer than five feet. I taped the whole thing together making sure one end of the shorter stick was at the five-foot mark and the block was level with the mast partner. Then I taped a spirit level to the whole lashup. Ravn's keelson is level so I was able to gage when the second stick was perpendicular. I made a mark. Phew!

A pattern, a chunk of purple heart, some time on the bandsaw and hollow-chisel mortiser, rasp, files and sandpaper and PRESTO! A mast step! I also added an screw eye to anchor a downhaul for the boom at the jaws. A little epoxy and I checked another item off the list.

Speaking of lists: I don't have an exhaustive list of jobs left to finish. I only make a series of short lists - with never more than six or eight items. I made the mistake once of ticking off the items remaining to be finished while talking to a friend. This was not written down and I skipped a lot of the small stuff. Still, that experience nearly sunk me into a state of depression. So, to keep off the Prozac, I make my lists short. When I get everything checked off the list I'm working on, I throw it away and start a new one.

Saturday, July 17, 2010

Kjeip or Kabes




I love rowing, but I am not a fan of oar locks. I've tried about every kind, and they just don't feel right. There's something about how the metal engages the wood that takes away from the organic feel of bone and muscle moving wood through water.

My eyes were opened several years ago when I rowed the Hewitt R. Jackson, a replica longboat built by the Grays Harbor Historical Seaport in Aberdeen, Wash. The longboat has 10 rowing stations, is 26 feet long and displaces more than a ton. It's a replica of the longboat Capt. Robert Gray carried aboard the Columbia and would be almost identical to the one in which Capt. Bligh made his famous open-boat voyage.

When I was with the Grays Harbor Historical Seaport - first as an employee, then as a volunteer and a board member - I had many occasions to sail aboard the seaport's flagship, the brig Lady Washington. As wonderful as crewing aboard a square rigger is, the longboat was much more fun. Although there are 10 rowing stations, she will move along smartly with only four or six rowers.

Part of what makes the longboat experience such fun is that the oarsmen pull against a thole pin with the oar held in place with a rope gasket. This was the eye-opening experience I had. This arrangement cured all of the complaints I had against metal oar locks. In addition to the feel - that can't be matched by metal oar locks - thole pins and rope gaskets are traditional, cheap, easily replaced and just look bitching!

Thole pins are what Atkin specified in the plans for Valgerda. I was planning, looking forward in fact, to putting thole pins on Ravn... that is until I saw pictures of faerings fitted out with kabes or kjeip. (I believe that kabe is the name Shetland Islanders call them and kjeip is the Norwegian.) These are even more traditional (on faerings, at least) than thole pins. And they are way more bitching! The problem for me was that I didn't have anything but pictures to go on in designing the two pair of kabes for Ravn.

I scoured the internet for anything I could find out about them. Other than a few pictures and some vague descriptions, I didn't have much to go on. I did decide that I liked the looks of the kjeip on the Viking-era faerings better than later, more modern - like, only a couple hundred year-old, versions. The Viking-era kjeip were made from a section of log with a branch sticking out from it. This would be much stronger than one carved out of a chunk of wood because the grain of the wood would flow correctly - otherwise you have, what woodworkers call, "a short-grain situation."

As soon as I decided to put kjeip on Ravn I should have shouldered my ax and bow saw and headed into the woods, but I didn't think I would have time to find what I needed and have them dry in time for the launch. Boy, was I blind: that was about 18 months ago!

Last winter I decided to dive in and make some out of white oak and glue some reinforcement pieces on the sides to strengthen the short grain so it didn't break off. This all looked good on paper, but once I sawed, glued and started to shape them I soon lost my enthusiasm. They just did not look right.

My enthusiasm returned a couple months ago when I spotted some eight-quarter purple heart in a specialty hardwood store in Seattle. I'd also been revising the design in my head and had a solution to the short-grain problem. Finally, last week I put pencil to paper, came up with a shape I liked and suddenly I was a kjeip maker again. My solution to strengthening the short grain is to drill a half-inch hole through the middle of the upright portion of the kjeip and epoxy in a half-inch dowel of purple heart I turned on the lathe. It sounds easier than it was, but it wasn't too bad.

The thing that took the longest was the shaping, first with a bandsaw, then with rasps, files and sandpaper. The process reminded me a lot of making cabriole legs, like Queen Ann and Chippendale tables have. The difference was that nearly any furniture wood is more yielding than purple heart. The stuff is like a mineral!

I used my best epoxy-gluing techniques to attach them to the gunwale and then reinforced the join with some 5/16 dowels. With no metal fasteners, you can remove the whole affair with a handsaw should it ever need to be replaced.

A hole - drilled on a near diagonal from outboard, aft to inboard - is for the length of quarter-inch line that will capture the oar. I may eventually splice together a proper gasket, but for now I want to play around with the length of the loop so I will use a Zeppelin bend to join the two ends.


Saturday, May 1, 2010

Keel Questions


The keel on Atkin's Valgerda may be the most controversial element in his design catalog. Yesterday I received an email from Tom in Georgia, who is about to order Valgerda plans, but needs shallower draft than the 18 inches drawn by Atkin. Here's part of my reply:

"I looked at the Atkin keel and decided to go with a little deeper version of what a traditional faering would have. Faerings, according to Atkin's own account, had a 4-inch keel that ran the length of the boat. I deepened that to 6 1/2 inches and included about 100 pounds of ballast. Without any keel at all the boat draws 6 inches, so I figure mine will draw about 12 1/2 inches. It also looks better to my mind than the Atkin keel. No doubt his would go to windward better, but not much better, I'll bet. The decrease in the wetted surface should improve performance under oars and all points of sail other than hard on the wind. That's my justification. For more on my thinking on the keel look at this post http://valgerda.blogspot.com/2009/09/ravns-keel-part-one_19.html and the two that follow it. You can also look at Rick Nardone's excellent build at http://ricksboatshop.blogspot.com/2010/04/closing-in.html and the comments following it.

"I did think about a centerboard, but not for too long. In the second issue of Boat Design Quarterly O'Brian talks about a Valgerda that he rowed and said it was a fine boat "except the builder ruined it by giving it a centerboard." I understand your need for shallow draft, but not having a centerboard opens up the inside of the boat in a wonderful way. I think it weakens the boat to have a centerboard and the board is always a maintenance problem and the case usually ends up leaking. That said, I'd love to see a Valgerda with a centerboard. I bet, with a proper foil, it would go to windward better than the original design. But, I think what we are taking about here is a full redesign.

"If I wanted a boat like Valgerda, but with a centerboard, I think I would build a Ness Yawl. They are beautiful boats and designed with a centerboard and kick-up rudder. Check out the voyage of my friend Giacomo from London to Istanbul in a Ness Yawl http://www.manontheriver.com/."

Rick Nardone and I have discussed this as well. His solution (unless he sells his boat and the new owner wants something different) is to go with a 4-inch deep keel like the original faerings had, but include the lead ballast into the keel. Since Atkin's lines are true to the original faerings it will need some ballast. Workboat designs need additional ballast because they were designed to carry cargo. I much prefer to have my ballast built into the keel than have it loose in the bilge. Having it in the keel means more room in the boat and less danger of loose lead damaging the boat or the crew in a knockdown. Having the lead lower means better righting moment too.

Valgerda's keel was a hot topic on the Wooden Boat Forum. The thread started in January 2001 and went on until late 2005. (http://forum.woodenboat.com/showthread.php?t=11679) I'don't think you could go wrong building the keel according to the design. I also think the Vikings knew a thing or two about boats. Whether my solution is a good one or not remains to be seen.


Monday, April 19, 2010

Paint the damn thing!


There are some projects on a boat the will go on for ever if you let them. Such is (was?) the figurehead on my boat. I could not leave it alone! I would walk by the bow of the boat on my way to do something else and grab a carving gouge or my patternmaker's rasp or a scrap of sandpaper and an hour... or two... or three later I would still be at it. I worked like I was in a trance.

There are at least two dangers in this: one is that you don't get anything else done (which happened to me since I was supposed to be building a cradle for my new grandson, Corbin, who came two weeks early) the other is you can get carried away and ruin what you are working on -- a slip of a carving gouge could really have set me back.

I decided today that I would allow my self 30 minutes for some final sanding, then I would paint the damn thing. In the background of this shot you can see the spray paint can containing the primer. Right after I took this picture I finished masking it and primed it. Now I can finally move on to other projects on the boat and finish the cradle.

I missed the first wooden boat show of the season in Depoe Bay so I could go to Washington and see my new grandson. This lets me procrastinate finishing the boat a little longer. I am feeling the pressure to get it done because we are beginning to have some very nice days. Days that would be great for sailing and rowing.

Sunday, April 4, 2010

Finishing



Got some finish on the thwarts and combings. I'm trying to make all the mystery mahogany look somewhat coherent.

I had some problem with a batch of epoxy: it did not kick. After three days it was still sticky. Luckily, it wasn't an important joint, just some filler around the base of the figure head. I scraped it all off and mixed another batch, which kicked off like a champ.

Thursday, March 18, 2010

Heads and tails



Last weekend I spliced on Ravn's figurehead. I've been putting it off for a couple of reasons. One reason was that I wanted to get the curve of the dragon's neck to flow into the stem. Another concern was just getting a nice-fitting splice so it would be solid. But most of all I was beginning to doubt the wisdom of putting it on at all. A couple of weeks ago I shaped the stern stem and I think it turned out real nice. I simply couldn't go wrong replicating the same shape at the bow.

I guess if you peeled away all the layers of the onion, my real concern was: Would it look goofy? I have no doubt that many will think it does, but I decided I like it. Those who don't, can just go hang.

As I was fairing the neck into the stem I realized that I carved this thing 10 years ago. At the time I had not decided for sure on a design. It's been a long journey.

Wednesday, March 17, 2010

Furniture


A furniture commission has kept me busy in the shop and slowed progress on the boat. I did manage make time to install the rest of the boat furniture, however. I epoxied in the risers for the rowing thwarts and made the thwarts and the mast bench by March 6 when my oldest son, Ethan, and granddaughter, Maddy, visited. I talked them into the photo above.

Atkin said the original faering from which he drew the plans had removable rowing thwarts. "Our forefathers knew a thing or two about making boats handy," he said, so he retained that feature in his design. I determined early on that I would keep that feature as well on Ravn.

What I discovered is that the thwarts are close enough in size that it's easy to mix them up and get them turned around. My solution to that problem was to use a scratch beader to scratch a single bead in the center thwart and a double bead in the forward thwart. I put them on the forward edge. They looked so good that I decided to scratch beads in the mast bench and the "princess seat" as well. It's a nice touch that serves a practical purpose, but it was another unplanned project that took time away from finishing the boat.