Originally Posted by mjsurfing
Hi all sorry for the silly question.
But when I have been fly fishing on my last few trips it has been below 0 deg cel (here in high country Australia) I have returned to the car and my two piece sage rod has had the ferrel stuck solid. I have been able to release the two pieces but not till I have gotten home and been able to get a good grip on them.
Why does this happen. I have never had it happen with any of my spin gear?
When you put the rod together, it was warmer. As you fished in the cold weather, the air that is trapped in the hollow rod section contract and a vacuum develops in then hollow rod sections. This seats the ferrule so you cannot pull it apart because you are pulling against a vacuum.
When you ice the ferrule, the two parts contract at different rates and the vacuum seal is broken.
Waxing a ferrule prevents two bad things that can happen to a fly rod.
The first is ferrule lock.
The second is a loose ferrule that can lead to rod breakage.
When the ferrule joint flexes, the female end tends to form an oval with the short axis of the oval in the direction of the flex and the long axis at 90 degrees to the flex. The male end has a circular plug in the end of the section. Therefore, the male end tends to stay more circular and is unable to match the oval pattern of the female side of the ferrule.
This causes separation of the long axis portion of female side (eg, it's diameter is now greater than the matching male). Simultaneously, the short axis of the female end now has a diameter that is less
than the matching male and so the male section tends to get pushed out - like toothpaste from a tube. So you get a combination of separation of the joint at the long axis of the female and simultaneously the short axis pushes the male end out - ergo, you get a loose joint.
If you wax the joint, there is a layer of wax between the male and female ferrule sections. As the joint flexes, the wax as a semisolid gets squeezed from the short axis to fill in at the long axis - ergo, the wax serves as an internal modulator to keep the parts from separating.
The second cause is centrifugal force. As we cast we are moving the rod through an arc, and in effect, the casting motion is a throwing motion of the rod. This centrifugal force tend to pull the sections apart.
The third minor cause is line friction on the guides. As the line is shot through the guides, the friction on the guides actually is a slight pull on the distal rod sections away from the proximal rod sections.
"5. UNSEATED FERRULES
Another easily avoided rod breaker is an unseated ferrule, which is like a time bomb, says Johnson: 'It’s an almost surefire way to break a fly rod.” The ferrule sections loosen up during casting, and if a fisherman does not reseat those sections, they will eventually break,' warns Jim West. 'It happens all the time.'
If you are casting weighted flies, sinking lines, or a Spey rod, it’s imperative that you check your ferrules regularly. The constant stresses and twisting action of casting will inevitably loosen those fragile connections. Some anglers combat this with a thin coating of paraffin wax...."
Silly newbie question