The Math of Buoyancy

[Eric Roach]

H'Islander has/had a needle that sank slowly and level. I think it was AYC with an equal slug of weight in the nose and tail. It didn't cast well, but it came in primarily level & just sub-surface on a crawl. My buddy likes these in shallow water when he wants to get under the chop.

I agree that prototypes are necessary, but if I can find the buoyancy "tipping point" for a shape, I can adjust the lead to get the total weight where I would expect a certain sink rate to occur...The whole idea is to compensate for differing densities between plug blanks.

Will it be perfect? Probably not, but I believe it will be closer than just putting the same amount of lead into each one and expecting them to have the same sink rate --something that's burned me on occasion.
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