What is the difference between bread-and-butter, plank-on-bulkhead, and plank-on-frame construction?
(1) “bread and butter – B&B” You need two plans of the line drawings, (a) – the sheer plan and (b) – the half breadth plan (see image at bottom of page). The half breadth plan shows the hull in section in equal parts say like as decks. These would be used to give the size of the wood to be shaped. But if you want to construct the full hull this as it says the “half” section you may have seen these used mounted on a board showing the hull design and this is where the sheer plan comes in which gives you the shape of each section i.e. the entry the mid section and the run. After you have cut the pieces of wood then shaped them they are glued and screwed the final peering is done to give a meeting shape. Some image examples (bread and butter): (2) “plank on bulkhead – POB”. As the term suggests these are the sub divisions of of hull which when sealed gives the hull water tight intrepidity in this case they are usually equalized this gives a point to which planks (strakes) may be attached.
