Nautical Research Journal


inside face of the bottom. Strike another line parallel to the inside bottom line and 2½ inches above it. T is is the top of the cleat.


On the inside of the bottom line measure inboard 2 inches from the inside edge of the bottom line on each side. From this point extend a line at an angle of 60 degrees inboard. T ese two lines represent the ends of the cleat.


On each side, where the inside edge of the bottom line intersects the inside of the bottom line, extend a line outboard at an angle of 143 degrees. T is represents the outside edge of the frame.


Strike a line parallel to and 1 foot 6 inches above the base line to intersect the outside edges of the frame erected in step 7. T is is the sheer line.


From the point where the outside edge of the frame intersects the sheer line, erect a line at 90 degrees to the outside edge of the frame. Measure 2 inches up this line from the outside edge of the frame. Make a mark.


From the mark made at the end of step 9 draw a line to where the top of the cleat line intersects the end of the cleat line.


T is completes the basic outline of the Station 5 frame. It should look like the drawing in Figure 4 with the exception of the two vertical lines parallel to the center line. Add these lines to your drawing. Each is 1 inch outboard of the centerline and represents the lower end of the crooks forming the side of the frame.


Figure 7 shows one of the sheets of frame drawings with the basic drawing instruments. For clarity, most of the construction lines have been erased together with lines for the top and ends of the cleat, leaving only the two main components of the frame. T e lower ends of both crooks have been tapered and rounded off . T is is for aesthetic reasons but,


more importantly, it removes excess wood from areas where less strength is needed. A radius has been added to the inside angle where the two arms of the crook meet. As this radius tends to follow the natural curve in the wood grain in this area, it adds extra strength there. Make a tracing of the crook, glue it to card stock, and cut out with a knife. (Figure 8) Do the same to make patterns for all the crooks. (Figure 9)


N ote that the exterior edges of the frame must be accurate. T e interior edges can have almost any shape provided the strength of individual members is not compromised. Photographs of such roughly framed craſt from around the world oſt en show meaningless humps and curves and


even bits of


bark on interior edges of frames made from natural grown crooks.


111


Sources and References


Boudriot, Jean, T e Seventy-Four Gun Ship, Vol. I. Annapolis: Naval Institute Press, 1986.


Chapelle, Howard I., American Small Sailing Craſt , T eir Design, Development and Construction. New York: W. W. Norton & Company, 1951.


-----, Boatbuilding. New York: W. W. Norton & Company, 1941.


-----, T e History of the American Sailing Navy. New York: W. W. Norton & Company, 1959.


-----, Yacht Designing and Planning, New York: W. W. Norton & Company, 1971.


Crothers, William L., T e American - Built Clipper Ship, 1850 - 1856, Characteristics, Construction, Details, Camden, Maine: International Marine, 2000.


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