[CAUT] Shank to Hammer weight spreadsheet

[Chris Solliday]

Has anyone tried to find a correlation between shank radius weight and shank pitch? If not I will try some.
Chris Solliday
  ----- Original Message ----- 
  From: Tim Coates 
  To: College and University Technicians 
  Sent: Sunday, February 17, 2008 10:55 PM
  Subject: Re: [CAUT] Shank to Hammer weight spreadsheet


  Keith,


  Listening and sequencing the shanks is very fast if done correctly.  I don't agree with Grotian's sequencing method.  I've been sorting low pitches to the bass end and high pitches to the top for over twenty years.  One basic principle I follow is a low pitched knock associated with a movement within the piano reduces power.  It is one of the main reasons I change front rail felt punchings.  Hard felt punchings create a low knock that robs power from the sound.   I find the same to be true with the pitch of the shanks.  


  But as I have said before:  to each his own.  Grotian does it their way and that's fine.  I know what works for me.   


  Tim Coates




  On Feb 16, 2008, at 8:07 PM, Keith Roberts wrote:


    My question is, if you are weighing the whole shank and flange, how do you know the distribution of the difference in weight? If 90% of the weight difference is from the knuckle through the flange, the SW wouldn't change much and so the presumed evening out of the weights is not there. The distribution of the mass could vary from shank to shank at all the different weights.

    I like the idea of listening to the sound of the shanks. A thinner light shank should produce a higher sound. Very quick too. 

    Keith Roberts


    On Feb 16, 2008 5:48 PM, Jon Page <jonpage at comcast.net> wrote:

          It takes too long.  Just dry fit the hammers to the shanks
        right after you've tapered them with the table saw ...


      I don't think you get the idea. Mating a shank's SW with a
      hammer weight will require less hammer mass alteration
      to achieve a smooth SW curve.
-- 

      Regards,

      Jon Page



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