[pianotech] Modified L Scale with 5 note transition

[Jude Reveley (Absolute Piano)]

Here are the two versions I'm aware of:

Z=(d²NLf)/.02078 published by Jim Hayes
Z=d(NT(1+B))^0.5 published by Dave Roberts

Nice work David. I like your approach to the transitions, although like so 
much else I would love to hear it to know for sure. This shape is very 
classic (Hallet & Davis did this but added wound trichords instead of 
bichords. I've got a few in the oven so I should have a better idea soon. My 
first transitional bridge was on my first RC&S project that Ron Nossamon 
designed for me about a year and a half ago. It's definitely an 
exponentially better piano than anything I've ever done in that class and 
turned me on to this wonderful world. Thanks Ron.

Are you throwing in Z-bars and radial rib arrays on all the pianos you add 
transitions too?

I've asked this a few times before, but what version of calculating 
inharmonicity are you all using?

Finally, how do you attach a graph onto an email?

Jude Reveley, RPT
Absolute Piano Restoration, LLC
Lowell, Massachusetts
(978) 323-4545


----- Original Message ----- 
From: "David Love" <davidlovepianos at comcast.net>
To: <pianotech at ptg.org>
Sent: Thursday, May 28, 2009 12:28 PM
Subject: Re: [pianotech] Modified L Scale with 5 note transition


>I think I took my Z formula from Roberts.  It's all calculated from the
> string data, not from the board.  There are a couple of formulas for this
> particular factor and nobody seems 100% satisfied with how the data output
> relates to the actual sound produced.  Others may be able to contribute 
> more
> to the formulaic issues.  I input the data so long ago now that I've
> conveniently forgotten the headache I got trying to translate the formula
> into spread sheet language.
>
> David Love
> www.davidlovepianos.com