Originally Posted by
Kontact
How do spoke lengths vary on one side of one wheel?
Why would relative tension between spokes on a single wheel be different from wack other when they are at the sane tension?
Do you understand that relative tensions was what I said? Doesn't seem like it.
Not exactly sure what you're asking here but to clarify:
Spoke lengths have variation. You as a wheelbuilder should know this. If you buy a bunch of spokes at say, 290mm lengths, some might be 290,5mm while some might be 289,4mm. Due to spoke head and elbow variation the spokes might seat at the hub at different "heights" making the spokes effectively vary in length after they've been threaded in the nipple. Rims may have variation and a 1mm hop at a pinned joint isn't unheard of no matter how much you crank up the tensions there.
So you end up with spokes which have different effective lengths. Scale length of a string or wire alters the tension required for achieving the same pitch. So different effective spoke lengths mean that in order to achieve the same pitch, they will be at different tensions. You won't be able to match tensions with pitch alone, which means pitch isn't the fine adjustment you think it is.
This is stringed instrument 101. If you wish to refute any of the above, you may want to read up on stringed instruments, how they're tuned, what scale length is etc.
And that's all
before string crossings come into play.