[pianotech] Soundboard Analysis

[Gene Nelson]

  _____  

Question to ponder:  Why would it be that although there is a positive
change in downbearing when the tension comes off there is no apparent change
in measured crown?  

 

*** Bridge rotation?

 

Gene

 

 

 

 

Rib#                       Crown                              DB w-ten/wo
Rib L    H        W  (mm)

Or section           w-ten/ wo-ten

 

1                              2/2
.006/.015                             600         17           28

 

2                              2/2
.006/.015                             790         20           27

 

3                              2/2
.009/.012                             940         20           27

 

4                              1.5/2.5
-.006/.003                            1040       20           27

 

5                              0/.5
-.003/.003                            1080       22           27

 

6                              0/0
-.009/.006                            1120       21           27

 

7                              0/0
.006/.018                             940         21           26

 

8                              0/0
.006/.021                             660         20           25

                                                                

9                              0/0
.006/.027                             560         20           18           

 

10                           0/0
.018/.042                             390         18           23

 

11                           0/0
.022/.045                             340         17           23

 

12                           0/0
.025/.050                             270         16           23

 

 

David Love

www.davidlovepianos.com

 

 

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