Flipping the angle the other way is not so easy unless you are going to make new keys. Unfortunately, the original angle often places the capstan so as to give the proper key ratio. Flipping the angle the other way will likely result in a rather high overall action ratio. Ron Overs knuckle to center pin distance is, if I recall correctly, 20 mm. David Love davidlovepianos@comcast.net -----Original Message----- From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of Sarah Fox Sent: Sunday, April 17, 2005 6:37 PM To: Pianotech Subject: Re: Capstan angle Hi Vladan, > I have never understood the reason for the capstan > angle on older Steinways. If anything, it seems to me > that the angle is in the wrong direction. My thoughts as well. My Wissner has Steinway's patented backwards capstan angle duplicated faithfully. If I ever change capstan position, you can bet I'll flip the angle the other way. I don't think the backwards angle really hurts anything, at least with regard to friction. That's more a matter of magic line stuff. However, adjustments to the capstan height would result in alteration of the radius from the centerpin hole to the capstan/wippen contact point, as well as the radius from the contact point to the wippen flange center. Since these changes would be in an opposite direction, they would change the overall SWR for the key -- increasing it as the capstan height is increased. IMO, that's the biggest weakness of this weird capstan angle. > Can anyone give me the patent number for that Steinway > patent? Maybe I can find an explanation there. If you find it, please let me know WHAT they were thinking! (I have my suspicions about what they were smoking... ;-) Peace, Sarah _______________________________________________ pianotech list info: https://www.moypiano.com/resources/#archives
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