Math/Physics Problem: degrees of rotation of tuning pin = howmuchpitch change

[Joe And Penny Goss]

Hi John,
My attitude also, but not for the guy that is working on the self tuning piano.
Did you know that there is now a self tuning guitar?
Only 234 strings give or take 30 to go <g>
Joe Goss RPT
Mother Goose Tools
imatunr at srvinet.com
www.mothergoosetools.com
  ----- Original Message ----- 
  From: John Ross 
  To: Pianotech List 
  Sent: Saturday, March 29, 2008 1:09 PM
  Subject: Re: Math/Physics Problem: degrees of rotation of tuning pin = howmuchpitch change


  I would wonder, why, with all the variables, would you be interested?
  It can obviously be done, but to what end?
  John Ross
  Windsor, Nova Scotia, Canada
  jrpiano at win.eastlink.ca
    ----- Original Message ----- 
    From: kurt baxter 
    To: Pianotech List 
    Sent: Saturday, March 29, 2008 3:04 PM
    Subject: Math/Physics Problem: degrees of rotation of tuning pin = how muchpitch change


    Ok, I asked this on a previous thread, but I think the question got buried.
    How would one calculate the pitch change implied by a given degree of rotation of a tuning pin?

    The know factors would be: 

    string length 
    string thickness
    tuning pin diameter (and therefore radius) 

    With those factors known, is it possible to calculate the exact rotational movement (in fractions of a degree)
    required to make a pitch change of say, 1 hertz at the note middle C?

    (this is a impractical theoretical calculation- ignoring, for the moment, and factor of friction)

    Anyone out there better at math than me?


    [kurt]

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