What's all this I hear about Inertia ?

[andré oorebeek]

Do you realize that you guys are always discussing who is right and  
who is wrong?

OOR


On Oct 6, 2008, at 11:23 PM, David Love wrote:

> That should read "...in the opposite direction directly  
> proportional..." so
> we don't have any further misunderstanding.
>
> David Love
> davidlovepianos at comcast.net
> www.davidlovepianos.com
>
> -----Original Message-----
> From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org]  
> On Behalf
> Of David Love
> Sent: Monday, October 06, 2008 2:12 PM
> To: 'Pianotech List'
> Subject: RE: What's all this I hear about Inertia ?
>
> I see you're still having trouble with the math.  If you change the  
> FW then
> the BW changes in the opposite directly so any change in the FW will  
> not
> change R.
>
> David Love
> davidlovepianos at comcast.net
> www.davidlovepianos.com
>
> -----Original Message-----
> From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org]  
> On Behalf
> Of Richard Brekne
> Sent: Monday, October 06, 2008 2:58 PM
> To: pianotech at ptg.org
> Subject: What's all this I hear about Inertia ?
>
> Greetings:
>
>    Then we're defining ratio differently (not to speak for Fenton).
>    Changing the front weight has nothing to do with the action ratio.
>    I believe what Fenton referred to was replacing lead with help from
>    the assist spring. Then you do have the same hammers, ratio, BW,
>    different leading, because the assist spring takes the place of  
> some
>    of the lead.  The action would therefore have lower inertia.
>
>    David Love
>
> I see you haven't quite understood the balance equation correctly  
> David.
> Changing the Front Weight most certainly and undeniably does change  
> the
> (SW) ratio. A most casual of glances at Stanwoods formula reveals  
> this.
> Again...this is part of why you will find any direct translation to
> another protocoll... the distance one for example... quite difficult  
> at
> best.
>
> Review Stanwoods formula.   R =  (BW + FW - WW) / SW
>
> Clearly a change in FW changes the value of the entire left side of  
> the
> formula, and hence the equivalent  R on the right side.
>
> Cheers
> RicB
>
>
>
>
>

friendly greetings
from
André Oorebeek

Antoni van Leeuwenhoekweg 15
1401 VW, Bussum
the Netherlands

tel :    +31 35 6975840
gsm : +31 652 388008

"where Music is, no harm can be"




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