<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; =
charset=iso-8859-1">
<META content="MSHTML 5.50.4134.100" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face=Georgia size=2>Hi Terry, questions on uprights? Not =
worthy, not
worthy. Except I have paying customers who don't have room for a grand, =
love the
old piano cases and want them to work well. </FONT></DIV>
<DIV><FONT face=Georgia size=2></FONT> </DIV>
<DIV><FONT face=Georgia size=2>I think it is simpler if we look at =
the fact that
the hammer weight has no effect. I hung the heaviest Wurzen felt Ronsen =
hammers
on the thing and the DW was the same at the bass as the treble. The =
friction
becomes equal note to note and less than on a grand because the =
friction at
the hammer butt is basically nothing. This being the case, the leading =
is the
same from note to note to achieve the same balance of the key and DW can =
be
achieved this way. I don't like actions with a 56 gram downweight. Too =
heavy.
</FONT></DIV>
<DIV><FONT face=Georgia size=2></FONT> </DIV>
<DIV><FONT face=Georgia size=2>The key ratio is a 1.66 so I'm =
thinking the
factory got the balance rail off by 1/8 inch. You have to double =
the
balance rail mistake soI figure a 5mm capstan move should do it. By =
tilting the
capstan I should pick up 3 grams DW. The 5 mm will be along the =
top of the
key and the top of the capstan will move 2 to 3 mm in relation to the =
sticker.
Total I expect to pick up 4 to 5 grams of DW. There is room =
on these
stickers to come that far forward but I can always remove the rail and =
take out
some wood to move the bottom rail where ever I want. That's the beauty =
of long
stickers.</FONT></DIV>
<DIV><FONT face=Georgia size=2></FONT> </DIV>
<DIV><FONT face=Georgia size=2>I certainly don't want to lighten the =
action by
adding lead. Removing lead might make it free wheel, not enough mass. I =
want to
see if changing the geometry to solve the DW problem will give it the =
"snap" I'm
looking for.</FONT></DIV>
<DIV><FONT face=Georgia size=2></FONT> </DIV>
<DIV><FONT face=Georgia size=2>Thanks for your interest Terry. No =
pictures yet.
I'll have to get some.</FONT></DIV>
<DIV><FONT face=Georgia size=2></FONT> </DIV>
<DIV><FONT face=Georgia size=2>kpiano</FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial"><FONT =
face=Georgia></FONT> </DIV>
<DIV><FONT face=Arial size=2>I don't know what might be a good BW =
for an
upright. I have lots of questions about balancing an upright action. =
Rumors
have it that David Stanwood is looking into upright action
balancing. In your case you have a lot of UW, if you don't have =
too much
lead in the keys now, you could add a little lead to the front of the =
key to
get the DW down to 50g or so and still have over 30g UW. How does the
capstan/wippen-heel-cushion interface line up - would moving the =
capstan help
or hinder? Also, what is the status of you butt springs - the tension =
there
will affect things also.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Do you have a picture of your Knabe? =
1890s Knabes
are just awesome!</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Terry
Farrell</FONT></DIV></BLOCKQUOTE></BODY></HTML>