half breadth station width calc

Discussion in 'Boat Design' started by aaronhl, Aug 25, 2023.

  1. aaronhl
    Joined: Aug 2012
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    aaronhl Senior Member

    Sorry to sound like I know less than I do - Is the station spacing in the center of the station? Should I account for the width of each station (building the plug)? And as thin as the stations may be, would it be a good practice to take the offset point at one particular edge, or is this trimming for the curve done during assembly?
     
  2. wet feet
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    wet feet Senior Member

    The station spacing should be even and regarded as a series of infinitely thin planes.When building the hull,or plug,the convention is to set the formers/moulds aft of the station in the fore section of the boat and forward of the station in the aft section of the boat.Which means that their edges are on the station.
     
  3. Waterwitch
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    Waterwitch Senior Member

    If you are concerned about distortion going from paper to plug, with a 48" long hull; the next step is to draw, loft the plan full size on a piece of 1/4 inch plywood painted white. You need to subtract the hull thickness for your plug, unless you are drawing to the inside measurments of your finished boat.
     
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  4. wet feet
    Joined: Nov 2004
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    Location: East Anglia,England

    wet feet Senior Member

    The most easily understood explanation of deducting plank thickness is probably the version in the Gougeon brothers book.It is available as a free download.
     
  5. aaronhl
    Joined: Aug 2012
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    aaronhl Senior Member

    I have started with a couple sheet of paper working on a 1:2 right now
    I am using a thin piece of wood and some small bricks to shape the curves, for curves a couple feet long, what would you recommend using?
     
  6. Waterwitch
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    Waterwitch Senior Member

    If your wooden spline is too stiff, a length of band saw blade of suitable dimension or metal pallet strapping comes in handy if working with improvised materials. Plastic splines are sold at drafting supply places along with spline weights.
     

  7. wet feet
    Joined: Nov 2004
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    Location: East Anglia,England

    wet feet Senior Member

    That makes me nostalgic! The idea of drafting supply places still being around is a quaint notion around here,CAD adoption killed them off a long time ago unfortunately.You can use strips ripped off the edge of plastic sheets,but they will need to be smoothed out both for aiding a fair curve and for leaving a nice surface to draw round.Plastic curtain track can be useful too.
     
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