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I just finished reading the article on Derek Browns favourite 15' five piece spey caster. I was first amazed and then baffled. I need some help to understand why a 5 piece rod would be anyones favourite .
The finest spey casting rod ever built was the greenheart. while they were often built in 3 pieces the joints did not have furrels but were splices held together with tape. This meant that the rod behaved as if it were a single piece.
With graphite joints every joint produces a hard spot at the joint which reduces the ability of the rod to bend as a single curve.
The reason for this behaviour is that hollow graphite sections bend by converting the circle of the rod cross section froom a circle to an elipse. At the piont where a joint occurs there is a double wall which virtually means that an elipse cannot be created therefore the furrel becomes a short straight section which is incapable of bending in conformity with the rest of the rod.
To make matters worse these stiff spots in the rod produce extra strains immediately above and below the joint which necessitates the rod being made heavier to offset these forces.
If we create a rod of five sections we have 4 of these unbendable points. Can anybody give me a resonable explanation of why we would want a rod with such a characteristic . ignoring of course the obvious 'it makes a shorter package for transporting.
And can they explain the mechanics of creating such a rod.
:eyecrazy:
The finest spey casting rod ever built was the greenheart. while they were often built in 3 pieces the joints did not have furrels but were splices held together with tape. This meant that the rod behaved as if it were a single piece.
With graphite joints every joint produces a hard spot at the joint which reduces the ability of the rod to bend as a single curve.
The reason for this behaviour is that hollow graphite sections bend by converting the circle of the rod cross section froom a circle to an elipse. At the piont where a joint occurs there is a double wall which virtually means that an elipse cannot be created therefore the furrel becomes a short straight section which is incapable of bending in conformity with the rest of the rod.
To make matters worse these stiff spots in the rod produce extra strains immediately above and below the joint which necessitates the rod being made heavier to offset these forces.
If we create a rod of five sections we have 4 of these unbendable points. Can anybody give me a resonable explanation of why we would want a rod with such a characteristic . ignoring of course the obvious 'it makes a shorter package for transporting.
And can they explain the mechanics of creating such a rod.
:eyecrazy: