[CAUT] Turbo wips

[David Stanwood]

Hi Paul,

The most conservative/classic approach is to adjust the springs on 
the bench with stack off and hammers up so that the wippens are 
hanging level on the springs.  This creates a very even spring 
tension.  Then weigh off with key leads normally for an even balance. 
In this scenario the springs will be working 9-10grams at the 
touchweight measuring point.

Steinway Hamburg used this method in production for many years in the 
earlier part of the 20th century.  What weigh off chart are you 
referring to?

David Stanwood



>Hi All,
>
>I'm having a problem with an older set of Renner Turbo Wips.  I have 
>no idea how to get a consistant spring strength from note to note. 
> It's weighing off all over the place, but it doesn't seem 
>consistant with how the springs "feel".  With the stack off and 
>hammers out of the way, some wips rise way up with a neighboring wip 
>hardly rising at all, but they "feel" different in springyness and 
>the weigh off chart says they're very close.  All else is in good 
>regulation and pinning.  On the whole, it's weighing off a bit 
>lighter than the professor likes, and wondering if I should just get 
>rid of the assisting springs?
>
>What say you?
>
>Thanks
>Paul