Not in the Stanwood method that I am aware of. You have to use standard distance formulas incorporating the three levers as a sum of the key, wippen and shank. The Stanwood method uses weight to determine the action ratio. It is the one drawback as it will not accurately give you an analysis of how the action will regulate. To do a thorough action analysis you should incorporate both distance and weight measurements. David Love davidlovepianos at comcast.net www.davidlovepianos.com -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of vince mrykalo Sent: Thursday, July 05, 2007 8:29 PM To: pianotech at ptg.org Subject: RE: Action ratio and knuckle distance Is there a formula that uses knuckle dimensions in figuring out AR (action ratio)? I am not finding it in my notes, and I remember some Stanwood formula that used that knuckle dimension in one of the formulas. From: "David Love" <davidlovepianos at comcast.net> To: "'Pianotech List'" <pianotech at ptg.org> Date: Wed, 4 Jul 2007 12:03:41 -0700 Subject: RE: Action ratio and knuckle distance Actually, Stanwoods equation of balance wont tell you that. The knuckle hanging is not isolated in the formula. You have to sample and do a weigh off. David Love davidlovepianos at comcast.net www.davidlovepianos.com -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Farrell Sent: Wednesday, July 04, 2007 11:47 AM To: Pianotech List Subject: Re: Action ratio and knuckle distance Stanwood's equations of balance would tell you that. Are you familiar with David Stanwood's work? Terry Farrell ----- Original Message ----- From: vince mrykalo <mailto:madvinmryk at yahoo.com> To: pianotech at ptg.org Sent: Wednesday, July 04, 2007 2:03 PM Subject: Action ratio and knuckle distance How do you figure out the change that would occur in ACTION RATIO (AR) if everything remains constant (strike weight, front weight,wippen balance weight, and balance weight) except the knuckle is changed from 16.2 mm to 17mm, on paper, without actually trying it out on the action? Vince Mrykalo RPT MPT University of Utah Vince Mrykalo RPT MPT University of Utah "Minél több a változás, annál nagyobb az állandoság" The more I learn, the less I know. <http://www.mrykalopiano.com> www.mrykalopiano.com _____ Building a website is a piece of cake. Yahoo! Small Business gives you all <http://us.rd.yahoo.com/evt=48251/*http:/smallbusiness.yahoo.com/webhosting/ ?p=PASSPORTPLUS> the tools to get online. -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20070705/e2e07828/attachment.html
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