Overs action design

[Erwinpiano]

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David
 =20
     I did attend Ron Overs class and I do have a handout I could copy =
to you.
  I think Ron's next move would be to post the details on list so all =
could have access to the detaols(Australian inflection in the spelling) =
and eess mates can have a go at it eif ya knouw whot aah  mean.
  I love the guy already ,hees one of us.
    Dale Erwin
  ----- Original Message -----=20
  From: David Love=20
  To: sec@overspianos.com.au=20
  Cc: Pianotech=20
  Sent: Thursday, July 15, 2094 8:27 PM
  Subject: Overs action design


  Ron: =20
  =20
  I don't know when you might receive this as I assume it will take at =
least a few days to return to Australia from Reno, but I have some =
questions about your action design.  I have copied the pianotech list as =
I am sure that those who did not have the opportunity to see it will be =
interested.  I could not attend your class in Reno due to some conflicts =
so forgive me if you covered this material there.
  =20
  1.  I assume that the layout is designed to put all the friction =
points on the convergence lines.  The most noticeable change therein is =
the capstan which angles toward the front of the key rather than the =
back.  Is the angle of the capstan set at the tangent to the arc scribed =
by the movement of the key at that point, or is it a more acute angle?  =
Is the idea that with the wippen heel set at 90 degrees to the capstan =
that there is no sliding and thus reduced friction?  It seems that this =
would also result in greater wippen speed since there is no lateral =
movement allowing you to use a slightly longer knuckle radius.
  =20
  2.  What is the product of all the distance leverages and does it =
correlate to a specific key dip/blow distance combination?  Have you =
found generally that there is a specific and absolute correlation =
between total distance leverages?  For example, TSDL =3D 6.5 correlates =
to 10mm dip and 45 mm blow, and for any deviation of x a corresponding =
change in dip and blow of y must be made.
  =20
  3.  What is the friction range in the action that you had in Reno.
  =20
  4.  Your shank uses a 20mm knuckle to center pin radius.  Was this =
done primarily to reduce friction at the knuckle because of your =
intention to use such a heavy hammer? =20
  =20
  5.  Just for fun.  All things being equal, what happens if you =
reorient a Steinway capstan toward the keyboard by 8-10 degrees, put it =
on the line of convergence and spin a slanted heel around backwards to =
put the two in line?
  =20
  It was a pleasure meeting you.  It's a beautiful piano you've produced =
and I wish you the best of luck with your project.
  =20
  David Love
  =20
  =20

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