01-23-2012, 08:17 AM
Re: 10wt backing, gel-spun or not?
Ok, now we'll really go on a tangent.
A static weight rating like '30lb' is describing an amount of force generated by 30lb while being accelerated by gravity. So the force would be F=MA
Converted to metric for the math:
F=13.6Kg x 9.8m/s^2 = ~133 Newton (unit of Force) to break 30lb. line.
Acceleration above 9.8m/s^2 could generate equal forces at less weight.
Not so much the weight of the fish, but the force generated by the acceleration of acrobatic jumps, abrupt turns, and rapid dives. In theory a 20lb fish could shake its head hard enough/quick enough to generate enough force to break 30lb line unless the rod bends or the drag takes the force. A 20lb fish is 9.09kg. If the 9kg fish accelerates at ~14.6m/s^2, even for a split second, it will develop the same forces as the 13.6kg fish hanging from a line.
Climbing gear is more appropriately rated in Newtons, as a falling climber rarely impacts the gear statically. I weigh 90.9kg, exerting ~891 Newtons of downward force at rest. If I am moving at 5m/s, and get tackled and come to a dead stop in 0.25s, my acceleration was -20m/s^2, or almost twice that of gravity. The force of the stop becomes F=90.9kg x 20m/s^2 =1818N.
Now say I or some other angler messes up, introducing a bit of slack to the system, and the fish shock loads the reel and rod... There you would get the sort of acceleration above and beyond that offered by gravity. Unhindered motion coming abruptly to a stop.
Physics is much more fun when applied to fish...
Very similar to a 3lb. fish breaking 5lb. line with a rapid direction change or head shake.