downbearing direction

[Stéphane Collin]

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
| > |
| > 
| > _______________________________________________
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