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Dear All, Here is another question I need to find an answer to. I am in a bit of trouble when deciding about the dimensions of the plywood to use. I'm using Dave Gerr's book on scantlings, but I'm not sure I'm doing it properly. I would like to use 16mm plywood for bottom panels, and 14mm for...

May be you are right, I got a bit lost in this... I plan to use those little spheres they use in hunting rifles, I dont know exactly which one, but I think they should have a diameter of 1 or 2 mm. As you say, the best thing is to make a test! We are in lockdown mode in Italy, so I'm not sure...

I made the same guess, but it looks to be wrong. ''For equal spheres in three dimensions, the densest packing uses approximately 74% of the volume. A random packing of equal spheres generally has a density around 64%.'' This is from wikipedia, but I searched a lot and all confirms this. Moreover...

Update: I think I will try the encapsulated keel solution: it seems the easiest and cheapest way to do it. I can fill it with lead spheres. I found out that the packing density (this is how they call it) of randomly packed spheres is 64% of concrete. I just have to find out the weight of the mix...

I like very much Glory, she was one of the boats that made me love so much the junk rig. There are many interesting ideas, but I'm afraid me and Sir Piggot started with a different budget in mind. One of my main drivers in the design process, was to design something I could build for real. As...

Thank you I know Triloboats but I passed through 'great auk' quickly. I will have a deeper look, but I gave up the idea of a boat wo keel. The initial idea was to have leeboards and internal ballast, but I did not feel comfortable in designing a hull that was adapt. This is my first design, and...

First of all thank you for your reply. The idea was to design something to be homebuilt, with the lower possible budget (I guess this is quite a standard..). It is supposed to be epoxied plywood. I bought building plans for Michalik Piccup Pram, which should have been built last summer. I...

Dear All, this is my first post here. I am an avid reader, and I want to thank you all for the great insights found. I studied many threads, and some of them have been printed, and found their place in the Yacht Design Books shelf. To make a long story short. I am a 46y.o. man, and I love boats...