Unknown blank power

[maibinenu]

If dealing with a complete unknown blank , how do you guys can find it's power ?
I mean the range of weights to throw
I read about common cents system but it looks to me that it can determine only the weight at which a blank bends until 1/3 of its length. It is used rather to compare blanks . Only my understanding , maybe i am mistaking.

[Mattman]

I use a different, but similar, measuring system. The results of the measurements don't really give you that sort of info. You need a base line to compare to.

If I assume that G. Loomis' power ratings are spot on and gospel, then I can compare back to that. If an MB843 is rated for 1/4 - 3/4 ounces and I measured it as requiring 600 grams to flex the blank, if I have another 7' blank that measures out at 600 grams, I'd rate that blank for 1/4 - 3/4 ounces as well.

Not all 7', 1/4 - 3/4 ounce blanks measure out the same. Ratings are pretty arbitrary. A repeatable measuring system is not. Often times you need to reference back to a known blank to describe a new one. But you have indesputable data to make the comparison.

The same can be said for action.

[dennis_rf]

I feel the action plays a big role in this, not only overall power.

If the measured power is the same, the faster and steeper the tip the lighter the lure range feels for me.

Thinking about my latest buy - evergreen kaleido super cougar - the tip feels as soft as a ML in my arsenal (380g RDA) while I measured more power (460g RDA) than another medium rod (440g RDA). The super cougar‘s tip is way faster than said other medium rod.

So referencing and comparing to known rods really is the way to go to find out.

[MikeK]

Mudhole sells a Deflection Tool that lets you support two rods or blanks side by side so they can be flexed by hanging weights. As Mattman said you need a basis, so compare the blank to a rod you have that casts a known weight range well for you.

[maibinenu]

Thank you for the answers !

[spoonplugger1]

The Common Cents system tells you far more about a blank than any other system ever has, you need to dive into all the chapters to understand what it can continue to tell you. Power and action angle tell you very little. Identical power and action angles can be made using any of the rod making materials, but they will not feel, or perform the same.

[spoonplugger1]

The power number you come up with, times 1/16 oz., will get you pretty close to the blanks upper casting load limit.