Fw: Upright Hammer Weight

[Farrell]

Oops. That's right Richard Stanwoods numbers are Strike Weight. I was simply
weighing hammers. Now how am I going to measure Strike Weight on the
upright? Or rather, I guess I can see how to set it up on the little stand
and measure the Strike Weight, but the real question would be how does this
compare with the grand numbers because now you have the weight of the hammer
butt incorporated into the hammer strike weight number. This is all becoming
clear as I write this. These upright SW measurement made with the butt
attached should indeed be directly comparable with the grand SW measurement.
Yes? No? I do believe this would be true. I'll go out into the shop and
measure some SWs with the old setup and the new and see where they fall.
I'll report back. Maybe I need to even look over Stanwood's stuff, but I do
not recall his material describing how it relates to an upright.

Terry Farrell

----- Original Message -----
From: "Richard Brekne" <Richard.Brekne@grieg.uib.no>
To: <pianotech@ptg.org>
Sent: Sunday, November 11, 2001 1:50 PM
Subject: Re: Fw: Upright Hammer Weight


> Farrell wrote:
>
> > After a little additional thought while bathing and washing the dogs, I
> > reasoned that upright hammer weights should be in line with grand hammer
> > weights. Why not? Similar stringing scale & soundboard designs, similar
blow
> > distance, similar key dip, hammer must be accelerated to similar speeds.
So
> > should not the hammer mass be similar to that of a grand? If so, then
should
> > I not be able to successfully utilize the Stanwood hammer mass charts
for
> > guidance??? What do others do? Simply duplicate?
> >
> > Terry Farrell
>
> Give it a try Terry. One of the big selling points of Stanwoods SW curves
is
> this whole buisness of voicing and how a nicely graduated and appropriate
mass
> curve comes into play. Tho the leverage concerns are arranged quite
differently,
> this much should work out with similiar results I would think.
>
> I find that a SW curve right on the delineator between heavy and middle
weights
> is a nice safe spot to be. Tho I still am quite the novice me thinks...
>
> --
> Richard Brekne
> RPT, N.P.T.F.
> Bergen, Norway
> mailto:rbrekne@broadpark.no
>
>