[Farrell]

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I would like to hear more on this also David. My guess is that static DW =
& UW would not be affected much, but I should think there would be some =
significant potential to affect inertia with different weight hammers.

Terry Farrell =20
  ----- Original Message -----=20
  From: David Love=20
  To: pianotech@ptg.org=20
  Sent: Friday, October 12, 2001 4:10 PM
  Subject: Re:=20


  I wasn't so much thinking about 14lb vs 16 lb.  I realize the =
difference hammer to hammer is minimal.  I was more thinking about =
moulding, size, etc..  I assume the hammer weight is less significant =
than a grand because of the hammer's relative position to the lever and =
the fact that it travels horizontally rather than vertically.  In a =
grand the relationship is generally 5 or 6:1.  I was wondering if there =
is such a general ratio for an upright or if it is even significant.  As =
I suspected, it seems relatively insignificant.

  David Love
    ----- Original Message -----=20
    From: Wimblees@AOL.COM=20
    To: pianotech@ptg.org=20
    Sent: October 12, 2001 12:36 PM
    Subject: Re:=20


    In a message dated 10/12/01 1:19:36 PM Central Daylight Time, =
davidlovepianos@earthlink.net writes:=20



      Generally, how does a change in the weight of an upright hammer =
effect the touchweight.=20

      David Love=20




    Because the hammer is at the end of a stick that has to be moved by =
levers, etc., there will be an effect on touchweight. However, the =
difference in the weight of the felt on a hammer is not going to make =
that much difference. I don't think you will be able to measure the =
touchweight difference between a set of 14lb hammers and 16 lb hammers.=20

    In case you didn't know, when you buy a set of 14 lb hammers, that =
is the weight of an entire sheet of felt, out of which 6 or 8 sets of =
hammers is cut. A set of 16 lb hammer comes from a sheet that weighs 16 =
lb. So by the time you get down to one hammer, the actual weight of a =
hammer is going to be virtually insignificant. If you want to reduce the =
touchweight of a hammer, removing the wood on the hammer, or the shank, =
will make more of a difference than replacing a 16 lb hammer with a 14 =
lb hammer.=20

    I hope I explained it right.=20

    Wim=20

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