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

[PAULREVENKOJONES at aol.com]

Thanks, David.
 
P
 
 
In a message dated 2/7/2010 10:10:34 P.M. Central Standard Time,  
davidlovepianos at comcast.net writes:

 
Since  the rib formation is based on a circle it doesn’t much matter how 
you cut  it.  I have altered the rib tapering before to move the center of the 
 full height of the rib more under the bridge in the upper end where the 
bridge  moves toward the belly rail.  But I’ve also done it without doing that 
 and I don’t really notice any difference.   
 
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 7:51  PM
To: pianotech at ptg.org
Subject: Re: [pianotech] Hammer  strike line. Was-----Yamaha Hammer  
Suggestion

 

 

 
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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