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E.g. if your your rod loads well with a 45' line @ 550grain, how much should a 55' and 65' head weight to load the same rod...

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E.g. if your your rod loads well with a 45' line @ 550grain, how much should a 55' and 65' head weight to load the same rod...

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A 65' taper of 550 gr. would "load" a rod same as 45' taper.

E.g. if your your rod loads well with a 45' line @ 550grain, how much should a 55' and 65' head weight to load the same rod...

Generally speaking - a longer line with more material will weigh more.

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Dan

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So in the OP’s case: 550 * 55/45 = 672 and 550 * (65/45) = 794. These seem a bit too much, as expected, so we need someone to propose a small negative nonlinear correction term.

Well, why do you want to know ?

E.g. if your your rod loads well with a 45' line @ 550grain, how much should a 55' and 65' head weight to load the same rod...

For a given taper design, it's a relatively straightforward exercise in integral calculus to figure this out, but, why?

For lines that have level back tapers -- some of the more recent NextCast lines, many comp lines -- it is even more simple : measure the head at the back, convert to gr/foot (tables in Al Buhr's book), multiply by # of feet in length change.

In my experience, this is a useful thing to know pretty much only if you have customized a line for a given rod, worn out the line, and then want to cut exactly the same line to the same specs as the first line. Even then it's only an approximation, due to manufacturing variation.

You can get approximations from the AFFTA tables for line weight class vs. head length. That's probably the most general thing you'll find.

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