The process of designing a catboat lead me into doing alot of research on boat design rather than just boat building which I had already been researching for a while, and the advise of people on this forum was very helpful. Well, I have decided not to build the catboat, mainly due to contraints of time and money for what I would have at the end of it. I think for what I intended to use the catboat for, ie; daysailing, creek crawling and extended coastal trips, could be served more efficiently with an open boat of similar length (15-20ft) but of much lighter displacement, and a tent for pitching on the beach overnight and/or a boom tent. The main thing I would loose would be having a galley and the ability to carry more supplies.
The original idea for building a catboat of the size I was designing was to have my first build being something in size between a small open boat and the heavy displacement offshore boat that I want to build to liveaboard. I have been looking at designs such as the larger Paul Gartside cutters with a long term liveaboard in mind, but it seemed a good idea to build something smaller first. Well, after working out the costs involved, it makes more sense now to build something light, quick to build and cheap for messing around in and put the money and effort that I would be spending on the catboat build towards building the big boat.
Prehaps against my better judgement I have taken what I learnt from the catboat design process and had a crack at designing the Big Boat, a offshore capable cutter with standing headroom but still small enough to be single handed and to be sculled (it will almost certainly be engineless):
LOD: 9.85m (32')
Beam: 2.9m (9'6")
Draught: 1.55m (5'1")
Displacement: 7140kg (15700lb)