dimension

I am interested in boat building and I realize a keel is an important part if not the most important part and I'm wondering how large my keel should be on a 6 m long old wood boat. I was thinking of making the keel 12 x 8 and frames 6 x 6 but then I realized it's too large for a 6 m long boat...

Hello, I am a student of Naval Architecture. I am doing scantling of midship section. I have calculated section modulus for various member. I have to calculate the dimension of various member from this section modulus. I am badly in need of a chart, where I get the dimension regarding section...

need some feedback.... rebuilding an 165hp mercruiser 250CID 6 in line. the specs tell bore size 3.875 (98.425mm) when i measure the bore it gets me 98.35 - 98.40mm measured with a bore gauge... measured it different ways and always get the same... being an mid 70s engine, don't know the usage...