"Chas Wade" schrieb im Newsbeitrag
news:dYZlc.24025$Ia6.3598054@attbi_s03...
SNIP
I'm considering buying a 4 piece blank and using the top three pieces
to build the short rod. What weight 9 foot rod would become an 8 wt 7
foot 3 piece rod? How would I go about calculating that sort of thing?

SNIP

If you want an #8 wt rod, you must buy an #8 wt rod, shortening a rod from
the butt end will not change its rating. Shortening it from the tip end will
do so, but there is no way of knowing by how much, except trial and error.
This is not advisable.

If you want a short #8 wt rod, then buy a nine foot #8 wt, and shorten the
butt. Actually, I can see little point in this. A nine foot rod is
generally more advantageous than a shorter rod.

TL
MC