OK, lets say that you set the bridge slightly higher in the front (speaking side), are you saying that the plane along the bridge and string to the hitch pin should be level? Curious minds want to know. Al G From: Dean May Sent: Sunday, November 23, 2008 10:29 AM To: Pianotech List Subject: Re: [pianotech] Downbearing >>So, Paul, my question to you is: What is the argument for anything other than "equal" bearing front and back? >>Frank Emerson I can think of one argument for zero back bearing, but I make no claims as to its practicality. It involves the same rationale as using vertical hitch pins to facilitate bridge movement. It seems to me that zero back bearing will minimize the tie down effect of the back scale length of the string. It can best be pictured by thinking in extremes. Imagine radical bridge deflection, i.e., the bridge wants to move +/- 10mm from rest. If your backscale bearing angle is a very steep 30 degrees (think exreme) it will allow the downward movement but not much upper. Whereas a zero back bearing angle will minimize the hampering of the movement and it will be more equal in both directions. -- Dean Dean May cell 812.239.3359 PianoRebuilders.com 812.235.5272 Terre Haute IN 47802 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech_ptg.org/attachments/20081123/5d2cde10/attachment.html>
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