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Topic: Drag increase on an emptying spool  (Read 6633 times)

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Offline REEFMAN

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Drag increase on an emptying spool
« on: July 14, 2011, 02:04:57 pm »
How the Drag increases on an emptying spool

This is a subject that most anglers should be aware of and understand, in order to avoid disasters.

When a big fish is taking line off a reel, the tendency for most anglers is to tighten up the Drag to try stop the fish or to try and turn it. All good and well. A serious problem arises however, when the line being taken continues. The tendency again is to tighten the drag once more - this is a recipe for disaster!

Torque is the turning force required to rotate an object around a fixed axis.
Torque (T) [Drag] depends on the Force applied to the object being turned (F) [force on the spool] and the length of the lever arm connecting the axis to the point of force application (r) [amount of line left on the spool].



In this article, we are simplying things for the sake of understanding them. There are many other variables that would need to be taken into account in order to measure this effect accurately... eg: line drag in the water, lubrication of the reel, line diameter, heat buildup in the Drag washers, air temperature, rod characteristics etc etc etc.

Simple physics tells us, (all other factors being equal), that the Force needed to rotate a spool (Moment inertia) is inversely proportional to the amount of line left on the spool.

Halving the line on the spool will double the Drag Force applied to it! Removing 2/3 of the line on a spool, will TRIPLE
the Drag force applied to the spool.

One can now see, that tightening the Drag while playing a big fish is courting disaster, and rather than burn-offs being the main reason for lost fish, the increase of the Drag on the spool is the most likely cause.

Anglers need to resist the temptation of tightening up the Drag on a fish heading for the horizon - rather they need to hope and trust that the drag of the line in the water and fatigue to the fish on an already tightened drag, is enough to slow a fish and turn it. Braid backing is usually between 4-600m in length, there is more than enough line right there to slow down most fish without tightening the drag further. If it's not enough, well then, you win some and lose some! But tightening the drag at this point will almost certainly result in the Drag force going beyond the breaking strain of line already being stretched to the maximum.

This principle applies mainly to the Rock and Surf angler that uses a Star Drag Multiplier reel. The Lever Drag reels used in off-shore situations usually have their Drag settings pre-set to 'Strike' settings, (normally25-30% of the breaking strain of the line). Lever Drag reels are capable of precise drag settings and this should never be a problem, as long as the angler doesn't interfere with the Drag settings during the fight! Pushing the Drag up during the fight will have the same effect...
HALF the line on the spool means DOUBLE the Drag force applied. 2/3 of the line off the spool will TRIPLE the Drag.

With Fixed spool spinning reels, the principle also applies, but there are complicated angular moments of inertia that need to be taken into account as well.

Next time you're on to a Big fish on a Multiplier reel... don't tighten your Drag once it's passed half way! Rather, loosen it, otherwise your line will snap!

Maybe this will help someone land the next big one!

Now is not a good time to go fishing... said nobody... EVER!!

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Offline Homie

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Re: Drag increase on an emptying spool
« Reply #1 on: July 14, 2011, 02:08:15 pm »
Makes sense !

 :resp:
and +cred Reefer !

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Offline Angler21

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Re: Drag increase on an emptying spool
« Reply #2 on: July 14, 2011, 02:14:03 pm »
 
Great stuff Reefs!!
 

Offline WalkersKiller

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Re: Drag increase on an emptying spool
« Reply #3 on: July 14, 2011, 02:18:49 pm »
Was thinking about this topic the other day actually thanks fior clearing up a few things  :shre: +cred

Offline Half-Pint

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Re: Drag increase on an emptying spool
« Reply #4 on: July 14, 2011, 02:23:40 pm »
Excellent post Reefz. We have all heard it here "it was still taking line after 600m on a locked drag and suddenly it cut me off" hmmmmm cut off or pushed the drag to high. Something I have been meaning to do is colour the last 50m of my braid. Keep your drag loose (ish) until the colour comes through and then its all or nothing

Offline John F

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Re: Drag increase on an emptying spool
« Reply #5 on: July 14, 2011, 02:36:28 pm »
Thanks Reefz!

+cred for taking the time to explain it so clearly! 

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Offline Himal

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Re: Drag increase on an emptying spool
« Reply #6 on: July 14, 2011, 02:41:36 pm »
I learn something new everyday here :uarocks
 :shre: Reef's


Himal

Offline Mudcrab

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Re: Drag increase on an emptying spool
« Reply #7 on: July 14, 2011, 02:45:52 pm »
Makes very good sense,thanks Reefz
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Offline Kumz

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Re: Drag increase on an emptying spool
« Reply #8 on: July 14, 2011, 02:48:11 pm »
 :shre: .. :udman: ...........+cred....

Offline strandloper

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Re: Drag increase on an emptying spool
« Reply #9 on: July 14, 2011, 03:46:26 pm »
Great Post Reefs!!
 
Hopefully I will get to test this theory sometime in the future.
 
 :shre:
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Offline Fritz

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Re: Drag increase on an emptying spool
« Reply #10 on: July 14, 2011, 04:15:38 pm »
Have seen this happen to the guys many times. The fish takes line and it looks like it wont stop so you increase the drag and you end up bustig your line. Biggest mistake we all make or have made.
 
Thanks for explaining to all of us in sutch detail Tony. (clap) (clap)

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Re: Drag increase on an emptying spool
« Reply #11 on: July 14, 2011, 04:25:28 pm »
 :tkx: for that explanation!

Offline Zetti

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Re: Drag increase on an emptying spool
« Reply #12 on: July 14, 2011, 06:38:06 pm »
Thanks Reefman. I tend to tighten the drag when I feel that I'm losing a fight, not anymore.
 
 
I learn something new everyday here :uarocks
 :shre: Reef's


Himal

 sry , off topic, Himal that is one proper  :shd:  you are holding in your avatar!
 
 

Offline SAfish

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Re: Drag increase on an emptying spool
« Reply #13 on: July 14, 2011, 06:52:02 pm »
Another top notch post, Reefz.  :shre: I will have to keep this in mind when I do battle with my first big  :brnz:
+ cred  :resp:

Offline Naruto

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Re: Drag increase on an emptying spool
« Reply #14 on: July 14, 2011, 07:02:57 pm »
Very interesting! Thanks Reefman!  :tkx:
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Offline REEFMAN

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Re: Drag increase on an emptying spool
« Reply #15 on: July 16, 2011, 07:12:30 am »
Shot.  :win:

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Offline boepsie

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Re: Drag increase on an emptying spool
« Reply #16 on: March 27, 2013, 05:08:41 pm »
true while rggies r slow and really take much line the fast boys r another story
My way is after hookup ill let it run no more than 50m before set my drag pressure to what Im happy with and leave it there
(Reason for the 50m easy drag is cause of blacktips)
I have gotten a few big snotklaps by probable big duskys tho
Whoooohoooooo

Offline Abaddon

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Re: Drag increase on an emptying spool
« Reply #17 on: March 27, 2013, 05:57:39 pm »
Great post Reefs.

My first hand experience with this phenomenon is when spooling braid.

I have an old Tatler I reel/measure the braid off the bulk spool with.
Placing this setup in a rod stand, I can then spool up my respective reel under a smooth, constant tension.
The thing is, that constant tension seems to increase as the braid gets less on the Tatler.
I would put that increase down to the heat generated by the constant wear on the drag stack causing it to get sticky, as one can clearly feel the reel gets hot.
I also would factor in my fatigue and as a result loosen the Tatler drag a little.

This now sheds some light on the whole experience.
Don't wish it was easier, wish you were better !!

Offline Nikao

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Re: Drag increase on an emptying spool
« Reply #18 on: March 28, 2013, 03:11:02 pm »
Good post Reef"s Is something to keep in mind when fighting those big  :billf: or  :yft: from the boat

Offline REEFMAN

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Re: Drag increase on an emptying spool
« Reply #19 on: May 03, 2019, 11:17:37 am »
Need to bump this post up. Someone on Facebook snapped off because he tightened his drag too much...

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