[pianotech] Modified L Scale with 5 note transition

[David Love]

N = number of strings in unison
B = the weighting factor of the wrap (.89 for copper), iron and aluminum
have different weighting factors
L = speaking length
T = tension in lbs
f in Roberts = the fractional elongation of the string under tension (the
core gets a bit thinner)  not sure what it means to Hayes
^ indicates raised to the power that follows that symbol.


David Love
www.davidlovepianos.com


-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Gene Nelson
Sent: Friday, May 29, 2009 8:22 AM
To: pianotech at ptg.org
Subject: Re: [pianotech] Modified L Scale with 5 note transition



Here are the two versions I'm aware of:

Z=(d²NLf)/.02078 published by Jim Hayes
Z=d(NT(1+B))^0.5 published by Dave Roberts

Sorry but would you please fill in the unknowns for me.
d=diameter
N=? please tell me
L=length
f=frequency
T=tension
B=? pleas tell me
^ =  please tell me

Thanks so much.
Gene