Why Are (Most) BFS Rods Are 2 Piece Rods?

[ghost]

Most BFS rods are 2 piece and some are 3 piece rods, why? I know some are 1 piece rods like the Phenix Classic BFS and Dobyns Ultra Finesse Sierra rods. 

 

I do prefer 1 piece rods, cuz I feel that the rod has better sensitivity than multiple piece rods. Case in point, I do own a couple of the Phenix Classic BFS rods in 6'8" and 7"1". Even the smallest crankbait, like the Rapala Countdown CD1 which is 1/16oz; I can feel the vibration of the lure quite well. Most times I use straight 10 or 15lb braid, but during trout season I will use 4lb Izorline XXX copoly line. I have to say that on some of the 2 piece BFS rods I own, I can feel the vibration too, but not quite as sensitive as as a 1 piece.

 

Are multi piece BFS rods more so for transportation or is it a JDM thing?

[redmeansdistortion]

Two-piece is more a JDM thing.  The Japanese typically drive smaller vehicles used in combination with public transit so a 1 piece can prove unwieldy in many circumstances.  Not all JDM rods are multi-piece, but they do make up the majority.  What the Japanese do to retain sensitivity is to use a spigot joint instead of a slip joint like is commonly used here.  A spigot joint flexes while a slip joint will have a flat spot where the ferrules attach when under load.  Very few USDM two-piece rods use a spigot joint, while in Japan very few use a slip joint.  In Japanese rods, you usually aren't seeing slip joints unless you're looking at super budget friendly offerings.

[djhands]

Mainly because bfs is out of Japan and most rods are going to be 2 or more pieces to fit in smaller cars bikes or on public transit 

[MickD]

I would like to see some objective evidence that a spigot is more sensitive than the ferrule joints commonly used here.  That flex argument doesn't make sense to me.  Yes, I'm a skeptic. 

 

Makes sense that the 2 piece is an accommodation for the smaller vehicles typically used in the country of origin of the BFS.  

[Tennessee Boy]

1 hour ago, MickD said:

I would like to see some objective evidence that a spigot is more sensitive than the ferrule joints commonly used here.

I’d like to see some objective evidence that one rod is more sensitive than another.  Billions are spent on rod sensitivity and no one has ever found a way to measure it.

[bulldog1935]

Spigot ferrule has a continuous bulk modulus change through the joint.  

It's no accident multipiece rods choose the configuration.  

Sleeve ferrule, because of the larger O.D., has local higher MOI and a dead spot in the taper.  

 

I probably tackle this differently from most people, but my rods in bass finesse niches are 1-pc.  

or offset handle for round reel w/ 1-pc blade

 

[MickD]

17 minutes ago, bulldog1935 said:

Spigot ferrule has a continuous bulk modulus change through the joint.  

It's no accident multipiece rods choose the configuration.

"Sleeve ferrule, because of the larger O.D., has local higher MOI and a dead spot in the taper."

 

Not all multipiece rods choose it, and while this is an argument for it, it is not OBJECTIVE evidence of higher sensitivity.  I doubt if any exists.  All the arguments I've read have to do with achieving a smooth action, not with any difference in sensitivity.  And even the action argument isn't compelling any more, IMHO : 

 

Here is an opinion I found (Midcurrent)  : However, the advent of high-tech graphite, new and stronger scrim materials, and modern design methods have allowed rod builders to create much slimmer, more efficient, and smoother sleeve-over ferrules—to the point that there are no longer any significant overall differences between rods constructed with each kind of ferrule.

45 minutes ago, Tennessee Boy said:

 Billions are spent on rod sensitivity and no one has ever found a way to measure it.

Trika says they objectively measure it. Valid?  I don't know. 

 

NFC about a year ago said they can measure it, but have never provided any data to back up the talk. 

 

If one believes that sensitivity is proportional to True Natural Frequency (many experts have argued for many years that it is)  of the blank/rod, then it's a piece of cake to measure TNF with an Android device.  

[ghost]

Can someone post a pic of a ferrule and spigot connection please? To me I can't tell the difference.

[bulldog1935]

Spigot ferrules on a J. Kennedy Fisher multipiece rod, which have always been considered the closest thing to a one-piece rod.  

Tip-over sleeve ferrule on a Phillipson - also copied by Orvis, and the style that first replaced metal ferrules.  

Fenwick's Ferrulite patent, considered the 2nd-deadest dead spot.  

The worst is butt-over-tip ferrule, which makes a hinge with the Deadest spot, and only found on Cheep rods.  

[Darth-Baiter]

learned something!  so my Triza is spigot, I think.

 

I can't tell it is a two piece at all.  badaas rod.

[ghost]

Thank you Bulldog1935!

 

[king fisher]

My lack of patience when snagged, makes it a certainty, a BFS rod would end up a multi piece rod, even if it came as a one piece from the factory.

[bulldog1935]

@king fisher there are good tutorials on FFR Rod Tinkering page that will show you how to repair that with spigot ferrules.