Quote:
Originally Posted by E. Harry  Denis,
That is interesting. I do not doubt that you are correct but anchor rope being melted under cold water is a bit counter intuitive. |
Emory, it certainly is counter intuitive, you would think the water would cool everything more than adequately.
the fact is ......... the melting happens.
It shows the heat generation power of a moving object on a static one.
the static anchor rope does not get water to the friction surface & builds up heat
the moving line however is fully exposed to the water as soon as it exits the contact area which is millimetres in length, the exposure time is very short as its moving fast & it contributes friction and incremental heat with little exposure itself.
The anchor line however is incrementally gaining heat in the constant contact area and quickly.
when fishing pelagics at anchor I always rigged a large Dahn Buoy to the anchor rope as soon as anchoring in position, so the anchor could be dumped as soon as a fish looked like it was swimming around the front of the boat............. only personally ever suffered an anchor rope "burnoff" once that way ( Dahn Buoy was rigged the very next day ........He He ).
The intuitive thinking that water should cool everything is what leads many people to think that the effect of the interaction is abrasion not heat.
Same deal with hot runs from fish like mackerel , Wahoo, tuna etc........on light line........... when line failure occurs its usually at the end of a run not during the run, as soon as the line is static on the heated guide ring.
Many anglers think that is the result of a "sticky drag" .........whereas its just momentary drag increase as the drag washers shift between dynamic friction and higher static friction factors at the end of a run as the fish slows & the rod ''nods".........allowing that momentary stall of the spool...........the wrong cause is attributed to the failure from flawed intuitive thinking.
( no drag is immune from this issue, Cal's grease .........whatever....... they reduce the difference between static & dynamic friction factors in the drag system but cannot remove the difference entirely ).
lessons often learnt the hard way.
a) I always wet the line on the reel before commencing fishing & periodically during fishing
b) when fishing pelagics a 'waterboy' with an empty softdrink can full of water is employed to dribble water on the spool during hot runs.
c) dry salty line, from prev use, deep in the spool has much higher friction factor than cleaner wetter line at the top. Salt is slow to re-dissolve, ........the water is a lubricant & a coolant for the line ( not deliberately the guide).
He He...........as an aside
Intuitively, You would not think a piece of fishing line could be passed thru a block of ice without cutting the ice in two.
try draping a piece of line with a decent sinker on each end over an iceblock & be prepared to be amazed.
This little trick can win you beers down the local..........He He.
Icecream is Yummy
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