Well, this is really a interesting thread about threads,... Generally speaken, if someone makes an experiment and expects a certain result very often he will get the desired result. Especially, if measurement equipment isn't handy. Would be interesting to see if Hans gets the same results.
I have a basic understanding how the stiffness might work to improve the turnover. But I'm not sure if this is acceptable. Some basics. If you examine a 'closed system' you observe: The sum of all energies in the system is preserved. This is one of the fundamental laws in physics. Let us look at a flyrod while casting. And let us think about a situation where somebody makes false casts on the surface of the moon. We don't have the influence of the air. While the line is in the middle of it's motion, all energy is stored in the line as kinetic energy. At the end of the fore cast, the line comes to a rest before it starts it movement into the opposite direction. At this point all energy is converted to energy which bents the rod. The rod gives the energy back to the line while back casting. In real life we have influences which prevent that the discussed system is a 'closed system'. Bending the rod transfers energy into warmth (you don't feel it but we are able to measure it), if the casts are done in air, there is a loss of energy too due to the air drag. The caster compensates this loss with his movement and double hauls. Now to the leader. Kinetic energy is calculated by mass times velocity times velocity divided by two. When the line or leader unrolls in the forecast we have 2 parts of the line. One part is in rest (the part from the rod's tip to the line bend) the second still moves (from the bend to the fly). The moving part gets shorter and shorter, decreasing the mass which is in motion. As energy is preserved, the velocity increases. BTW: this is the reason why a lash bangs, iits tip gets supersonic speed, you hear the hypersonic boom. The fly takes a lot of energy out of the system due to air drag. Therefore tapering the line/leader down removes mass more, increases speed much more and compensates the energy loss and straitens the leader. Hope this was understandable. Rene -----Urspr�ngliche Nachricht----- Von: Paul Marriner <[EMAIL PROTECTED]> An: [EMAIL PROTECTED] <[EMAIL PROTECTED]> Datum: Montag, 21. Januar 2002 14:50 Betreff: Re: [VFB] The battle lines are drawn (was: furled leaders) >I think we've likely beaten this to death but I'll get off my stool for >one more round. > >I'm sitting in front of the computer with three things. An 8-weight, WF, >floating Cortland flyline; a tapered mono leader, butt diameter .024"; >and a 6' furled leader made of 6/0 UNI-Thread (don't know how many >strands). At least to my bending tests, the line and mono are close in >both diameter and "stiffness", the furled leader has approximately the >same butt thickness but is clearly "limper." >If you are saying that the best energy transmission occurs when the tip >of the flyline and the butt of the leader are "identically stiff" then I >agree. In which case, at least in my hands, the mono wins. A corollory >is that the tippet end of the leader should also match the tippet >properties, true for a furled leader and light tippets but not for the >furled leaders I've seen and the heavy tippet used for large flies. >Of course I now have to trade with Henk for one of his pike leaders to >see if it's stiffer than regular furled leaders and if it turns over big >flies in my hands as well as he says it does in his. >As I recall, this started when a lister asked if furled leaders worked >for large flies. You said yes, but recommended one tied from 3/0 thread >or mono. I said that I disagreed because I had tried one constructed in >the first way you recommended and it didn't perform satisfactorily, >because, I felt, it wasn't stiff enough. You, however, never did say >that you had tried your recommendation successfully. > >Cheers, >Paul >-- >Paul Marriner >Outdoor Writing & Photography. Member OWAA & OWC. Author of Atlantic >Salmon, Ausable River Journal, Miramichi River Journal, and Modern >Atlantic Salmon Flies.
