Quote:
Originally Posted by bluefishercat
This is the difference between the center of gravity and the center of bouyancy. It is a complicated thing to figure out in a boat never mind a little tiny fishing lure.
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You should try it in an airplane,,,,
Ok. I am trying not going to get to technical,,, here is a picture,,, I did it quick so it is not the greatest explanation.
Imagine that this is the same exact floating needle made out of AYC,,, Look at the way it balances and then sits in the water.... The actual CG is way aft of the CB. Obviously because of weight or Density of the lure. Hence Dynamically unstable.
Now action comes from the way the lure moves through the water based on shape and stability.
To make it simple you need to find the point of dynamic instability (Weighted aft) This point is the point at which the object will continue to move away from the stable point with the stable point being that of no action. That dynamic instability is what gives it its action.
add a lip and start looking at fluid dynamics.
and the way the water flows around the lip causing action.