Bechstein B hammer rake / more thoughts

[Dean May]

There's a lot of piano design "features" mfrs have seen fit to include or
exclude that I cannot account for. At least Steinway played with it so
evidently a brighter mind than mine thought the idea surely had some merit. 

Dean

Dean May             cell 812.239.3359 

PianoRebuilders.com   812.235.5272 

Terre Haute IN  47802

 


-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of John Delacour
Sent: Saturday, June 21, 2008 12:15 PM
To: Pianotech List
Subject: RE: Bechstein B hammer rake / more thoughts

At 08:29 -0400 21/6/08, Dean May wrote:

>From an engineering perspective (at least, this engineer's perspective),
>maximum energy transfer of the rotating mass of the hammer would dictate
>that the hammer be perpendicular to a line from the tip of the hammer to
the
>center pin. That's not likely to happen given the physical constraints we
>find ourselves with.

There are no such constraints with the upright action, so can you 
explain why only Steinway, to my knowledge, on the old K uprights 
etc., implemented any such arrangement for a while and then abandoned 
it?  In 120 years none of the great makers seem to have acknowledged 
the brightness of this great light.

JD