[pianotech] Modified L Scale with 5 note transition

[Gene Nelson]

Thanks so much.
Gene
  ----- Original Message ----- 
  From: David Love 
  To: pianotech at ptg.org 
  Sent: Friday, May 29, 2009 8:50 AM
  Subject: Re: [pianotech] Modified L Scale with 5 note transition


  Let's try this again in HTML for better spacing.

   

  David Love

  www.davidlovepianos.com

   

   

   

  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 

   
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