What's all this I hear about Inertia ?

[Fenton Murray]

>I still dont buy into the idea that 10 grams or more of lead switched out 
>with equivalent in assist spring strength is going to result in the same 
><<feel>>.

>Cheers
>RicB

Ric Ric Ric,
Unles someone took over my point and changed it, you missed it. I don't buy 
it either.
Fenton

----- Original Message ----- 
From: "Richard Brekne" <ricb at pianostemmer.no>
To: <pianotech at ptg.org>
Sent: Monday, October 06, 2008 4:11 PM
Subject: What's all this I hear about Inertia ?


> Of course you (and David) are correct here. Late at nite, looking <<too 
> casually>> at a simple formula while forgetting its use in practice are my 
> only excuse.  My apologies for not being more careful.
>
> But now that we are clear of this, which also gets me past the bit where 
> compensating for lead with assist springs leaves the SW ratio the same.... 
> (the last being the stumble which got me into this mess) I still dont buy 
> into the idea that 10 grams or more of lead switched out with equivalent 
> in assist spring strength is going to result in the same <<feel>>.
>
> Cheers
> RicB
>
>
>    Grin... if you change the amount of FW,  then you change the Ratio
>    and you no longer have "an action with the same hammers, ratio, and BW, 
> but different leading" You have an action with both different
>    leading and different ratio.
>
>
>
> If all that one changes is FW, then the only thing that changes is BW. SWR 
> stays the same as does Action Ratio and regulation.
> -- 
>
> Regards,
>
> Jon Page
>
>
>