I know boat building schools like woodenboat offer courses in half hull building. Doing it yourself will probably require a lot of reading and research. Seems like quite a beautiful hobby, good luck.
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who is staring at the sea is already sailing a little
Your local public library may have books on the topic. They probably have their collection listed online, so you won't have to go unless they have something worth checking out. Howard Chapelle calls the book "American Ship Models and how to build them" by V.R. Grimwood (Bonanza Books, New York, 1942) "...the best in the field of ship modeling". You're likely to find something more modern.
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"... the only matter of consequence before me is what I will do with my alloted time. I can remain on shore, paralyzed with fear, or I can raise my sails and dip and soar in the breeze." - Richard Bode, First you have to row a little boat (pg. 94)
Wish ya good luck, you seem to have about as much an idea about building a boat as me. For your sake I hope you plan to start small, and test it on a shallow lake.
Looking forward to reading the update on your progress.
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If you want to keep your shadow behind - walk facing the sun !
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