This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Ron: =20 I don't know when you might receive this as I assume it will take at = least a few days to return to Australia from Reno, but I have some = questions about your action design. I have copied the pianotech list as = I am sure that those who did not have the opportunity to see it will be = interested. I could not attend your class in Reno due to some conflicts = so forgive me if you covered this material there. 1. I assume that the layout is designed to put all the friction points = on the convergence lines. The most noticeable change therein is the = capstan which angles toward the front of the key rather than the back. = Is the angle of the capstan set at the tangent to the arc scribed by the = movement of the key at that point, or is it a more acute angle? Is the = idea that with the wippen heel set at 90 degrees to the capstan that = there is no sliding and thus reduced friction? It seems that this would = also result in greater wippen speed since there is no lateral movement = allowing you to use a slightly longer knuckle radius. 2. What is the product of all the distance leverages and does it = correlate to a specific key dip/blow distance combination? Have you = found generally that there is a specific and absolute correlation = between total distance leverages? For example, TSDL =3D 6.5 correlates = to 10mm dip and 45 mm blow, and for any deviation of x a corresponding = change in dip and blow of y must be made. 3. What is the friction range in the action that you had in Reno. 4. Your shank uses a 20mm knuckle to center pin radius. Was this done = primarily to reduce friction at the knuckle because of your intention to = use such a heavy hammer? =20 5. Just for fun. All things being equal, what happens if you reorient = a Steinway capstan toward the keyboard by 8-10 degrees, put it on the = line of convergence and spin a slanted heel around backwards to put the = two in line? It was a pleasure meeting you. It's a beautiful piano you've produced = and I wish you the best of luck with your project. David Love ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/36/23/1b/ab/attachment.htm ---------------------- multipart/alternative attachment--
This PTG archive page provided courtesy of Moy Piano Service, LLC