I just measured the natural frequency of an XMG50 908 fly rod and was surprised that its frequency (3.17 Hz) was much lower than the higher values I have seen for a 9 foot Lamiglas HSGF blank that were around 4.0 Hz.
Does this mean the tensile strength of the newer SMG50 material is less than the material used for the HSGF series of rods?
Do the blanks carry similar ERN/AA numbers using the Common Cents system?
No one knows as much as all of us.
Do the blanks carry similar ERN/AA numbers using the Common Cents system?
I do not have a HSGF rod so I do not have comparative CCS numbers, but from the description of the XMG50 Graphite material:
The Newest "Super" Graphite.
This super graphite allows us to make smaller-diameter blanks with faster actions. The XMG 50 utilizes a blend of high-modulus graphite fibers to create a perfectly balanced, lightweight blank that is more responsive and more sensitive than anything on the market today.
I expected the newer xmg50 material to result in a faster rod (based on the natural frequency) than the XSGF series, and was disappointed to find the natural frequency of the XMG 908 rod was not very high.
Gordon W Judd