Join Date: Jan 2012
Location: British Columbia
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Re: Pros and cons of steel sailboats
How do they design pressure cans to take the pressure? Not Mikes drum skin, flat ,supported by the edges, shape. Check the bottom of pop cans, beer cans, aerosol spray cans, and some propane bottles. They are concave , taking the pressure in compression, on an arc , the same way origami hulls take the pressure. You don't see flat, drum skin type bottoms on such pressure containers, for good reason. Nor do you see framing..
I once made a muffler that way . The vibrations caused it to crack along the edges, from metal fatigue, the same way a hull depending on such an idea would tend to crack. Cut a pie shaped wedge out of it and pull it together, like a slight cone, and you will have no such problems. Again, depending on shape for strength, the same way origami hulls get their strength from shape.
Brent Swain, Boat designer, Builder, and author of "Origami Metal Boatbuilding"