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

[PAULREVENKOJONES at aol.com]

In a message dated 2/7/2010 9:42:00 P.M. Central Standard Time,  
davidlovepianos at comcast.net writes:

In  my experience the crown is not necessarily shifted forward since the 
rib is  formed in a uniform radius.  There is certainly more control of the  
stiffness in the killer octave of an RC&S board since it is determined by  
the rib design and not by the unpredictability of compression crowning.   
That I know, but would have expected  that there might be some rib radius 
shift as part of the design. 
 
Thanks,
 
P

 
David Love 
www.davidlovepianos.com
 
 
From:  pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On 
Behalf Of  PAULREVENKOJONES at aol.com
Sent: Sunday, February 07, 2010 7:21  PM
To: pianotech at ptg.org
Subject: Re: [pianotech] Hammer  strike line. Was-----Yamaha Hammer  
Suggestion

 
David:
 

 
In  your experience, is the crown set further forward in the killer octave 
in  RC&S boards? Is there a greater stiffness that comes with that  
construction in the killer octave? Random  questions...
 

 
P
 

 
 
In a  message dated 2/7/2010 9:18:48 P.M. Central Standard Time,  
davidlovepianos at comcast.net writes:

I  agree it seems about the soundboard but what specifically about the  
change
in design accounts for that difference.  The answer is not  jumping out at
me.

David  Love
www.davidlovepianos.com


-----Original  Message-----
From: pianotech-bounces at ptg.org  [mailto:pianotech-bounces at ptg.org] On 
Behalf
Of Ron Nossaman
Sent:  Sunday, February 07, 2010 6:16 PM
To: pianotech at ptg.org
Subject: Re:  [pianotech] Hammer strike line. Was-----Yamaha  Hammer
Suggestion

David Love wrote:
> I've found the same  thing.  Strike line deviation being necessary on
> original  boards but when I replace the board on the same piano with a  
RC&S
> board the strike line seems to straighten out, or the curve  becomes
> unnecessary.  What's that about?  

It's  about the soundboard, I'd say.
Ron  N

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