Hi, pretty much every article I've read regarding the Double haul. Eludes to the fact that hauling increases the load on the rod. Yet none of them tell you how or why rod load is increased.

Is this a fact or not.

If someone could explain in simple terms, how hauling increases rod load. That would be good.

Sean

Hauling primarily increases line speed - it does not necessarily increase rod loading. There are lots of quite complicated physics arguments related to this.

Cheers James, the increase in line speed. I can get my head around that. Probably couldn't explain in writing though. I may have a go at some point.

Sean

Is this not about momentum? If you have two lines travelling in the same trajectory, but one is faster than the other, then it must place more load on the rod?

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Chris,

Q: If there are two indentical objects and one is travelling at 10m/s and one is travelling at 20m/s - which one has the greater force acting on it?

A: Neither; they both have zero force acting as they are not accelerating. (and it's this force that bends the rod).

Ok, so the one going faster had a higher force acting on it in order to accelerate it to the higher speed then. Nope, not necessarily - it might of had a lower force applied for a longer time. Like I said it gets complicated.

A perfect haul will be applied late when the rod is unloading.

To increase line speed, you will need to apply a force to it. Unless the rod is completely rigid, I don't see how you can do that without also loading the rod.

Yes you're right. However if you haul when the rod is unloading there isn't any increase in rod bend, just (perhaps) a delay in the unload that the casual observer would not see.

Hauling does have a loading effect of the rod, but so does the back and forth movement of the rod, have a loading effect. Loading the rod is a side issue to hauling, whose main purpose is to increase the line speed in the "unload" stage. The haul is performed as the rod passes the vertical, which by that stage, the rod begins it's unloading, thus more speed, a tighter loop, less wind resistance due to the tighter loop...result...more distance.

I disagree that the rod starts to unload as it passes verticle , the rod can't unload until it is decelerated enough that the line is traveling faster than the rod. I would say that this begins with the the caster stopping the rod hand and ends when the line passes over the rod tip at the point when the rod becomes straight before it counter flexes.

Sorry if this is a little complicated for some, but I have to dash of to the river and don't have time to simplify my explanation.

Sean , on the whole hauling increasing line speed but there is also an amount of extra load added to the rod however. I believe that this is and should be negligible for a good haul to work the caster should decrease the work done by the casting hand. Allowing the haul to produce most of the energy in the line.

Two simple experiments.

1 lay a line on the ground and give it a pull/ haul. What happens to the line?

2 Fix the line to something solid,this simulates an increase in inertia, gently pull on the line. What happens to the rod?

To some degree both of these experiments will show you what happens when you haul.

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Hello thats about right, happy fishing