Stéphane Collin wrote: > > Hi Ric. > > I did your interesting experiment on a 9ft grand (thanks for sharing it). Well, in my opinion (worth as much as ... ), the piano sounds better, I think, without the coin. ROLF !!! I will agree about the sound, and about the idea of doing it on an upright... but I suppose you will have to lay it on its back and somehow get the action to work despite that in order to compare flying pennies. But tell me... now that you have << seen >> the force of the vibrating sting in this perspective... what do you think... ? Can the string pull up against the bridge pin enough over time to cause any of the problems our origion poster queried about ? I have my own thoughts, but I'd like to hear yours. > But I intend to do the experiment on an upright (where the hammer strikes in the direction of the downbearing). I just have problems balancing the coin. Cheers and Merry Christmas ! RicB > > Stéphane Collin. > > RicB said : > | Here's a cute little experiement tho to illustrate a bit of the amount > | of force that yanks upwards on the bridge and front pin. Place a penny > | (or similiar coin) on the string just front of the bridge so that the > | penny is balanced on its thin edge and as close to the bridge pin as > | possible. It should balance fairly easily between two strings of a > | unison. Then bang on the string with a very hard blow and watch what > | happens (how fast and with how much force). Do the same thing for > | several strings of various lengths. You might also try placing the penny > | up as close to the aggraffes / capo bar as you can to see what happens > | there as well... just for fun. > | > | Cheers > | RicB > | _______________________________________________ > | pianotech list info: https://www.moypiano.com/resources/#archives > | > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives
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