Longitudinal members

Building a 22 1/2 foot classic cruiser.

Home Which boat? Where to start? Building the frames Building the stem Setting up Longitudinal members Fairing Planking Painting Righting the hull Trailer Engine

 

 

With all the frames secured to the setup jig, it was time to lay the keel. Using a circular saw we nibbled blade-width by blade-width, here's the slots cut for the keel:



Next was the chine log. The chine was to be 1 1/2" W x 2 1/4" D x 24' L. Starting at the stem, we anchored and began bending it in place. We didn't get anywhere near the closest frame and it was obvious it would break if we continued. We then built a steaming chamber out of our BBQ grill and some 4" plastic plumbing tubes. That didn't work either. The next course of action was to use the band saw to rip the chine into two 3/4" pieces and put them on in two laminations. Even with steaming, we heard some noises when putting them in place, but there wasn't any obvious damage to them. Possibly the noises we heard were my knees knocking at the thought of having them break. Here's some pictures:



Because of the limited working space, we had to steam them in place. After steaming each lamination, we had 20 seconds for Teri to grab the transom end of the chine and hold it high up in the air and away from the frames, and for me to secure the front to the stem, AND, to bend it around the frames from front to back in one smooth motion. Yes - we practice this routine several times before actually doing the steaming. In the photos, you can see the keel already in place. In the upper left you can see plywood attached to the wall. This is about the only place we had to store the two 16-foot sections of factory scarfed plywood. These were also the two pieces of plywood that were the only two questionable pieces of wood we felt was sub-par. We had several voids requiring to be filled with epoxy.

The book states the battens should never end just beyond a frame and should extend as closest to the next frame as possible. By now this mild V-bottom hard chine hull with bulbous section at keel and reverse curve at chine that was designed for double diagonal planking on bottom and sheet plywood planking on the sides was making me wish I choose a total sheet plywood hull. 1" x 3" battens just don't want to bend that much. I resorted to steaming them in place and using chain/turn-buckles to slowly pull them in place while steaming. Since I've noticed you can steam kiln dried wood into fairly good curves provided the steam is continually applied while you're bending.


 

We got all batten perfectly bent within an inch of the next frame. Only the middle most battens required some kerfing. Note in the pictures the extreme curvature of the chine. After all this, the sheer clamp seemed simple.