Hauling, Rod-loading.

rb608 wrote:
On Nov 10, 1:35 pm, "
wrote:
Whether the mathematical model is entirely accurate, I am no longer
sure. I will have to check it again.

I believe the magnitude of the air resistance to be relatively
inconsequential to the casting mechanics (though on a windy day, it's
effect is undeniable afterward), so with your permission, I'll leave
it out for simplicity. That makes your equation to be:

Frt = Fi * Fa * Flt

It's my contention, however, the the force terms should be grouped,
and that the unbalanced force causing the line acceleration is
actually (Frt - Flt). This allows your model to fit into the F=ma
equation as:

(Frt - Flt) = Fi * Fa

I don't think that's a great deal different than you were describing
it verbally; but it *is* a great deal more accurate as a physics
equation.


The units issue I mentioned is manifest in this series of equations
from your post:

30g * 1m/s² * 0.3 = Flt / 0.01kgm/s²

30g * 1ms² = 0,03kgm/s²

* 0,3 = 0.09 kgm/s²

Note that between the first and second equations, you simply discarded
the kg.m/s² units in the demoninator, using only the same units that
go with the Flt force in the numerator. Had you retained those units
as you should have, the numerator and denominator units would cancel
and you'd have ended up with no units at all on the right side, but
g.m/s² on the left.

Indeed, I think you are correct. Seems I made another mistake copying
this stuff over, and I am still having trouble with the mathematical
model. I will have to check the originals and see if I made the same
mistake there. otherwise somebody would have picked up on it.
Or maybe they just read the theory and ignored the faulty equations?



(Frt - Flt) = Fi * Fa

= (0,01kgm/s² - Flt) = 0,03kg * 1m/s²


I am going to try and graph it with the data I have.

Thanks a lot for that, it seems to be correct, and agrees with some
other actual data I have. I am still not entirely sure it is correct,
but it seems to make sense.

My apologies for being somewhat short with you, I am rather inured to
some things by now, and they colour bo9th my judgement and my reactions.

TL
MC

On Nov 10, 3:06*pm, "
wrote:
My apologies for being somewhat short with you, I am rather inured to
some things by now, and they colour bo9th my judgement and my reactions.

I've been scare here of late; but am well aware of much of the
amazingly destructive invective being hurled about; and a lot of
people may owe a lot of other people apologies; but you do not owe me
one in this instance. I understood the volatility when I chose to
respond.

rb608 wrote:
On Nov 10, 3:06 pm, "
wrote:
My apologies for being somewhat short with you, I am rather inured to
some things by now, and they colour bo9th my judgement and my reactions.

I've been scare here of late; but am well aware of much of the
amazingly destructive invective being hurled about; and a lot of
people may owe a lot of other people apologies; but you do not owe me
one in this instance. I understood the volatility when I chose to
respond.

Perhaps, but I thought I needed to apologise. And I think you were right
and I was wrong.

Quite apart from which, unless somebody breaks the continuity it simply
becomes a vicious circle and all sensible comverse becomes impossible.

TL
MC

On Nov 10, 9:31*pm, rb608 wrote:

With regard to learning to haul, it really does help if you
concentrate on using as little power as possible, both with your rod
and your line hand, and merely trying to maintain tension.

That is basically all there is to it. People I have taught since
using this method have been hauling quite well after a couple of hours
at most.

Also, what sometimes helps with haul timing is to imagine that you are
using a yoyo in your left hand. The rhythm required for double hauling
is easier to pick up if you imagine that. The line is the yoyo, and
you are merely keeping it swinging back and forth.

A couple of other tips; don´t try and force more power into your
delivery stroke. This invariably jiggers the cast for many people.
Simply let go at the right moment.

Also, there is no point in a lot of false casting, it´s bad for
casting and for fishing. Haul into your back stroke, allow the line to
straighten but maintain tension, and then haul into your forward
stroke, and let go.