This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Hello Terry and List There's an awful lot needs discussion - about uprights. One item your = posting brought out was the issue of UW. This, I suppose, is Uplift = Weight? On page 165 of Max Matthias book "Steinway Service Manual" he = gives the factory key weighting as 47g. and the Uplift weight 20gr. with = the dampers raised. There are several other important facts discussed in = the book, about grands and upright S&S, but is it possible to show, = graphically, how this Uplift Weight is calculated and derived? Regards from a freezing, sunny Sussex-on-Sea Michael G.(UK) ----- Original Message -----=20 From: Terry=20 To: Pianotech=20 Sent: Friday, February 25, 2005 1:02 AM Subject: Re: upright balance weight 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. Do you have a picture of your Knabe? 1890s Knabes are just awesome! Terry Farrell What would be optimal balance weight for an upright? My searching has revealed a suggested lower 40's. I have a 56 gDW, = 37gUW. friction is ~10 grams. 46gBW. I'm thinking I need a 4 gram drop in BW. Sure I know it's just an = upright but I want performance. I'm thinking capstan move. Kpiano ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/06/fb/a9/0e/attachment.htm ---------------------- multipart/alternative attachment--
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