Nautical Research Journal 207
23. T e completed hull displayed above a doorway. Note the two fl oorboards, four thwarts and pairs of tholepins in balks between frames.
Alternative planking
With its straight sides, the bateau can be planked with a single sheet like present-day driſt boats and dories. Use model aircraſt birch plywood in that case. It also can be planked with uniformly straight- edged planks. T is will produce a slightly narrower and shallower hull amidships.
Details
Only two details added to the basic hull will actually contribute to its strength — the rail and the riser. T e rail is a long narrow strip attached to outside of the top plank at the sheer line. As it is thicker than the plank itself, it adds considerable strength at the sheer. T e riser is attached to the inside of all the frames at a uniform height above the bottom, primarily to carry the moveable thwarts, but it also adds strength. (Figure 22)
While some of these details have prescribed thicknesses in the list of scantlings, 1/16-inch basswood stock will serve for most items. T ose inclined to precision can laminate or purchase heavier stock and sand to proper thickness measured with the new calipers. T e fl oorboards are simply two 8- or 10-inch wide planks laying on all the frames, spaced an inch or two along the centerline. T ey will need to be tapered on the outside edge to fi t in
the fi nal frame at each end. T e thwarts are nothing more than 10-inch wide boards resting on the risers. Small cleats on the underside keep them in position. Gardner shows four located between frames 2 and 3, 4 and 5, 6 and 7, and 8 and 9. To match these, he has heavy 4-inch wide balks fi tted between frames 1 and 2 and 5 and 6 on the port side and between frames 3 and 4 and 7 and 8 on the starboard side. T ese basically are triangular in section to match the fl are of the hull and off er a fl at 4-inch wide surface at the sheer. Each is bored for a pair of tholepins. A large 2- or 3-inch ringbolt is mounted in the head of the bow and stern timbers. (Figure 23)
You have built a model of a nineteenth-century lumberman’s bateau, entirely from scratch, without plans and in much the same manner as the actual boats.
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.
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