You might try "hanging" a penny or other object, from above the string, whereby letting it touch the strings of the upright. you could conveivably drill a hole in the object, or hot glue a piece of mono filament or string to it, and hang it from a point closer to the front of the piano, so the angle would force it to lay or lean aginst the strings. Or maybe a small magnet might work in the experiment for both verts and grands; you'd have to figure out a way to read the vibrations or whatever the effect might be on the magnet as it would most likely not be visually observed. Terry Peterson ----Original Message Follows---- From: Stéphane Collin <collin.s@skynet.be> Reply-To: Pianotech <pianotech@ptg.org> To: "Pianotech" <pianotech@ptg.org> Subject: Re: downbearing direction Date: Wed, 24 Dec 2003 18:39:21 +0100 Hi Ric, seriously now, I agree the experiment is eloquent. Stéphane Collin (still thinking) ----- Original Message ----- From: "Richard Brekne" <Richard.Brekne@grieg.uib.no> To: "Pianotech" <pianotech@ptg.org> Sent: Wednesday, December 24, 2003 3:13 PM Subject: Re: downbearing direction | | | 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 | _______________________________________________ | pianotech list info: https://www.moypiano.com/resources/#archives | _______________________________________________ pianotech list info: https://www.moypiano.com/resources/#archives _________________________________________________________________ Make your home warm and cozy this winter with tips from MSN House & Home. http://special.msn.com/home/warmhome.armx
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