Touch weight

[Ed Sutton]

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Vince-

Never having learned calculus, I don't know how to work a formula like =
this.

Assuming that I have
-Strikeweight continuity within Stanwood's suggested range
-Frontweight continuity within Stanwood's ceiling
-Even and acceptable DW & UW

How can I use this formula to improve action performance?

Thanks!

Ed Sutton
  ----- Original Message -----=20
  From: madelyn mrykalo=20
  To: College and University Technicians=20
  Sent: Friday, December 19, 2003 12:56 AM
  Subject: Re: Touch weight


  Hi-

  Of course you can have acceptable DW's & UW's and at the same time =
have a wide range of moments of inertia, some which may be acceptable =
and some which may not be.  Or the front weights could be too high.  =
That's why I don't think UW/DW alone tells us enough about how the =
action "feels". =20

  =20

  Here is a formula for moment of inertia (I):

   I=3D m1r12 + m2r22 + m3r32 + ... + mnrn2  =20

  =20

  Where m is the mass and r (radius) is the distance that the mass is =
from the balance hole of the key.  The key itself has some moment of =
inertia too.

  =20

  So the action in question (Wim's D) might weigh off acceptably (DW and =
UW), but also may have a too heavy a front weight, and/or moment of =
inertia.

  =20

  Stanwood has come up with a good standard of front weights.  Moment of =
inertia standards are a little more ambiguous at this point. More =
importantly is that the moments be reasonably smooth from key to key.



  Brian is right.


  Brian Lawson <lawsonic@bdmail.co.za> wrote:
    Hi, I think he is referring to the English language with use of a =
virgule and
    not a division sign

    3 : a mark / used typically to denote "or" (as in and/or), "and or" =
(as in
    straggler/deserter), or "per" (as in feet/second) -- called also =
slash, solidus,
    virgule

    Brian



    ----- Original Message -----
    From: "Richard Brekne"=20
    To: "College and University Technicians"=20
    Sent: Thursday, December 18, 2003 3:29 PM
    Subject: Re: Touch weight




    madelyn mrykalo wrote:

    > HI-More telling than downweight/upweight is moment of =
inertia/front
    > weight (which are two different things). UW/DW will not, in and of
    > itself, tell much of anything about the action's feel.
    >

    I think you want to explain this a bit further for us. How exactly =
are
    you ariving at ! the moment of inertia (for the key) and what does
    dividing that by FW tell us exactly ?

    Cheers
    RicB




  Vince Mrykalo
  University of Utah


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