Hammer assist spring ?

[Delwin D Fandrich]

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  ----- Original Message -----=20
  From: Richard Brekne=20
  To: Pianotech=20
  Sent: June 07, 2003 1:06 PM
  Subject: Re: Hammer assist spring ?


   =20
  This is the part that intrigues me. The ability to set very close =
letoff and the ability to control the action at pianissimo levels.


  This, to me, is the greatest limitation of the so-called "modern" =
grand action......=20
    Boy do I aggree with this. Kind of appropriate that this comes up =
right now as well as I have just run into a pianist / piano combiniation =
that quite obviously requires of me a level of pppp and control of that =
which I simply can not regulate into the piano. I can push all the =
borders to the limit and it still isnt going to satisfy him. He really =
needs soft springy mallets. :)=20

    I have been thinking of  moving the capstan line in just abit. This =
would drop the ratio a bit giving less hammer / shank speed for same =
amount of key motion. It would also lessen DW tho... which could well =
serve to give the opposite effect I want... but I'm tempted anyways. =
Besides... just happens that the capstans on this Seiler grand are too =
loose anyways.=20

    What do you think ?


I think you can try all that stuff but it won't make up for the fact =
that the grand action is up-striking and you can only set let-off so =
close to the string. From that point on the hammer goes into free-flight =
and you must have attained sufficient hammer velocity to carry the =
hammer through this distance and still impact the strings with enough =
force to make meaningful sound. It's just very difficult for the pianist =
to do this with consistent control.

The vertical action, by contrast, does not have to fight gravity for =
those last couple of millimeters of flight. (The Fandrich Vertical =
Action was (is?) regulated with let-off at about 1.5 mm.)

So, when I hear some say some grand action design can be regulated with =
let-off right up to within 1 mm of the string line I at least want to =
give the thing some thought. And one of those thought is, "I wonder how =
this thing would work with a nice graphite-filled ABS or Nylon jack?"

Regards,

Del
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