Tuesday, February 7, 2012

Drifter 17 Main hull 3

Centerboard with tubing for control lines.



Control line exit will end up inside cockpit locker.




Notching the frames for bunk stringers.




The frames in the interior are cut off 1/4" above the stringers, and a grooved frame cap is added.




Bunk stringers, and 1/4" plywood bunk sides are installed.



Bunk boards installed. 1/4" plywood with 1/2" x 3/4" cleats glued and screwed to the bottom.



Locating the beams. The forward beam is attached to the back of frame 2. The aft beam is located using spacers 1/4" shorter than the distance of the beam cut outs on the amas. Screw the spacers to the ends of the beams, to locate the aft beam. Level the main hull, and check that the beams are vertical with a level. This is important so that the amas will fold up without binding. Also check the diagonal measurements to the corner of the beams so the beams are installed in the hull square. Locate the aft beam frames, and epoxy and tape in place.



Beam spacer




Aft beam frames




Remove the outer part of the beams by pulling the hinge pins. Glue and screw the beams in place.




Add the aft frames to the forward beam, with a block at the bottom on the bunk.




Fit a 1/4" plywood frame under the forward edge of the aft beam. Screw and glue a 1/2" square cleat to the bottom of the beam, and glue the frame in place.




Add a 3/4" x 1 1/2" cleats to the front and back of the cockpit for the stringers, then notch the cleats, and frame for the stringers. Locate the outsides stringers where the bottom of the cockpit meets the sides.



Cut out for a drawer under the cockpit for galley storage, and install stringers to hold the drawer slides. Install the drawer before you finish the cockpit floor, as it will be hard to get to latter.




Fit and install the cockpit stringers.




Add cleats for the cockpit sides.



Installing cockpit floor and sides. These are pre-glassed, and sanded, except for the port side, which is notched around the centerboard trunk, and then glassed.




Framing for the aft cockpit, with hatch opening.




Framing for aft cockpit sides and deck.




Installing aft cockpit deck and sides. These pieces are pre-glassed, and sanded. The rounded corners are two layers of 1/8" mahogany veneer.










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