[pianotech] Hammer strike line. Was-----Yamaha Hammer Suggestion

[David Ilvedson]

Just curious...Ron, at one time you installedl CC soundboards?  

David Ilvedson, RPT
Pacifica, CA  94044

----- Original message ----------------------------------------
From: "Ron Nossaman" <rnossaman at cox.net>
To: pianotech at ptg.org
Received: 2/8/2010 7:43:25 AM
Subject: Re: [pianotech] Hammer strike line. Was-----Yamaha Hammer Suggestion


>David Love wrote:
>> Suffice it to say that
>> the modified strike line seems to be a requirement of cc
>> boards and not pure RC&S boards, at least in my experience.

>Mine too, which I found interesting, which is why I mentioned 
>it in the first place on the off chance that someone else 
>would also.


>> One other comment, the RC&S boards that I'm doing are all
>> calculated in terms of stiffness in each section of the
>> piano (Ron has touched on that method in other threads on
>> the subject) so there's no by the seat of the pants
>> reckoning in terms of the rib dimensions.  Pianos that are
>> hybrid designs or where the stiffness of the board in
>> different areas is done more by feel aren't part of my
>> experience and are probably not good candidates for drawing
>> conclusions from since the stiffness in each section can't
>> be quantified in the same way.

>Exactly. This is another fundamental point that seems to be 
>largely lost in the fog. This stuff is by intent, and in 
>considerable detail developed through a lot of hard work and 
>expense over a considerable number of invested hours of 
>uncompensated time. No one has all the answers in infinite 
>detail, but following the indications has certainly been 
>interesting.
>Ron N