Question Linear density stats for power slinky strings?

[darrcass]

Hello;

This is my first post here. I am interested in fretting a guitar neck to a non-equal-temperament configuration.

I've got the math together for fret placement, but I am missing a variable -- I need to figure out the linear density of the strings.

So I need to get the mass of the string and the mass of the ball end.

Any suggestions as to where I could find this sort of data for a standard set of Power Slinkys?

 

[DrKev]

Hi, and welcome to the forum!

You could email customer service and ask them (see links below). They are usually very helpful, though I can't tell you if the give out engineering data. Can't hurt to ask though. Or...

...you could measure it. Contact the physics or engineering dept of your local university, or even ask a compounding pharmacy if you could use their precision scales. You could snip off the ball end and measure it separately. Then measure the length of each string and you are good to go.

Question (from a very curious ex-physicist)

What are you trying to calculate that involves the ball end? It's not part of the speaking length of the string and I would not have thought it would make any difference.

 

[darrcass]

Hi! Thanks for your reply.

I want to calculate fret placement for a non-equal-temperament guitar neck/fretboard. The math I have been able to come up with is based upon this: http://jwilson.coe.uga.edu/EMAT6450/Class Projects/Hornbeck/Math, Music, & Guitar.pdf

The temperament I am interested in was developed in 1962 by Maria Renold: "The Scale Of Fifths" (M. Renold)

The difference from standard 12-TET is very subtle, but in my opinion (and a growing number of others) very sublime.

 

[darrcass]

You get the linear density (kg/m) by dividing the mass (g) of the string (minus the ball-end) by the length of the string, which would be the scale of the guitar from nut to bridge.

This is mentioned in the article I already linked to, which in turn sources this article: http://www.asee.org/documents/confe...ing-a-Guitar-to-Showcase-Math-and-Physics.pdf

 

[darrcass]

EB Customer Service got back to me with the linear density (US, not metric) for each string in the Power Slinky set. Very cool.

11 - 0.00002900 lbs/in.
14 - 0.00004200 lbs/in.
18p - 0.00007100 lbs/in.
28 - 0.00014700 lbs/in.
38 - 0.00027100 lbs/in.
48 - 0.00042200 lbs/in.

 

[Tollywood]

Welcome to the forum.

 

[xjbebop]

...now my head hurts...

 

[darrcass]

Thanks

 

[Kevin Dasilva]

Thanks

darrcass, how has that idea been going? For the past half a year i have been trying to find an example of a guitar in Renold's 12T5... I have been able to speak with very few people on the subject. I am teaming up with a luthier, my guitarrist, to try and make that happen in the near future, although I have been wondering if it already had been done to have an idea.

thanks!