I can think of several reasons why a staggered capstan line would be better. Varied placement of the knuckle to center would create friction differences due to the weight bearing on the knuckle. The angle of the jack would be different. You would have to buy two sets of shanks, moving the knuckle is not very forgiving. A staggered capstan line would keep the compromise in the key/wippen part of the assembly. A difference between 5.0 and 5.4 (assuming the sharps are at 5.4) does not require a move in the key ratio all the way to 5.0 for the sharps. Since the point of contact changes on the wippen lever giving greater mechanical advantage as you move away from the wippen balance rail, the total advantage is multiplied when you move the capstan toward the balance rail. To make the total action leverage equal, the move required will be something less than to 5.0. Even if you have to relocate the wippen heel, it would be better, cheaper, and give a more uniform feel to move the capstan on the sharps. Also, since the magic line is often compromised on the sharps anyway, why create more magic line compromises by moving the knuckle on some of the notes? David Love ----- Original Message ----- From: "Richard Brekne" <Richard.Brekne@grieg.uib.no> To: "PTG" <pianotech@ptg.org> Sent: January 17, 2003 3:37 PM Subject: More off the wall stuff Hi folks. I guess I have been throwing some off the wall ratio related question to you all the last few days... its because I am just looking at some things and my mind just seems to want to work this way to sort it all out. So... begging your partience... here's yet another. We see very very often that the key ratio between the black and whites are significantly different. Sometimes as much as from 0.50 to 0.54. Perhaps more in some exceptional cases. There has been thrown out several different ways of approaching handling this. But here is one I havent heard and am curious about. What would bad about staggering the knuckle position ? It wouldnt take much to compensate for the difference in key ratio to even out the overall ratio.... Just another thought I'd love hearing your thoughts about. -- Richard Brekne RPT, N.P.T.F. UiB, Bergen, Norway mailto:rbrekne@broadpark.no http://home.broadpark.no/~rbrekne/ricmain.html _______________________________________________ pianotech list info: https://www.moypiano.com/resources/#archives
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