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OtakiriLad

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About OtakiriLad

  • Birthday 06/03/1948

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    Sunshine Coast, Queensland, Oz

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  1. Many thanks for the learned replies. I am now happy to shape the rabbet only on the keel with a 90 degree inner angle. This then begs a question when it comes to the rabbet on stem and stern timbers particularly high on the stem with a bluff bowed ship (such as HMB Endeavour). In such a ship the ends of the planks are almost perpendicular to the stem so is the rabbet very shallow or is it let into the stem timber much like a dado housing and if so, how deep?
  2. For some time I have been wondering about the profile of rabbets. My understanding is that in its simplest form the rabbet is a housing used to hold the garboard strake so the outer face merges smoothly with the keel. In almost all the documentation I can find I have found the rabbet carved as a v-shaped notch thus. [ This means the edge of the garboard strake would need to be shaped to match the angle at A, whatever that angle may be. In fact I believe the rabbet would always be cut with the angle at A being a right angle (ie 90 degrees) to accommodate the square edge of the garboard strake. This would occur regardless of the angle at which the strake meets the keel as shown in versions 2 and 3 below. This approach would also mean only one timber needs shaping (the keel) rather than two (the keel and strake) which I imagine would have been preferred by the shipwrights. Any thoughts? Dave
  3. As far as deck planking was concerned, my understanding is these were 'holystoned' and over time would have ended up smooth as regardless of how rough the surface was when it left the shipyard.
  4. That's it!!! Many thanks indeed - I will now write it down properly named so I don't lose it again.
  5. Somewhere I have seen a set of formulae which can be used to determine the dimensions of a block based on the diameter of a rope. For example in 18th century merchant ships the thickness of a sheave is 1.1 times the diameter of the rope and the diameter of that sheave is 6 times the diameter of the rope. I seem to remember the swallow (or the gap into which the sheave fits) is 1/16" greater then the thickness of the sheave. For the life of me I cannot find or remember the other parts to determine the length and width of the block or the thickness of the cheeks or the thickness of the intermediate pieces between sheave in double, triple or fourfold blocks. Can anyone help or point me in the right direction. Thanks in advance. Dave
  6. This all begs the question - when do you shape the planks (Bevelling the edges, spiling etc) - before or after soaking, bending and drying?
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