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Creating a larger version of a plug?
I want to make a larger version of a needlefish and I have been thinking about how to upsize the plug while keeping the characteristics (sink rate, angle, etc…) the same. My first thought was that I could just use the same multiple on the dimensions and the weighting but then I started thinking back to some physics classes. After doing a little bit of reading on volume and buoyancy it seems that going up in size on all dimensions by a factor of 1.25 gives me nearly double the volume which would nearly double the buoyancy so I would need roughly twice the lead to offset the buoyancy of the larger piece of wood? I'm sure I'm still missing something.
Another, maybe easier, way to do it might be to keep the ratio of wood to lead the same based on the weight of each?
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