Cantilever bridges and speaking lengths

[Farrell]

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You don't specify: are you addressing sound output from the piano or =
what the marketing department of the manufacturer can put in their =
promotional material. "Mrs. Jones, brand X piano has bass strings with a =
speaking length 2.7% longer than brand Y, yet brand X can be had at the =
same price as brand Y......

Terry Farrell

----- Original Message -----=20
From: "Calin Tantareanu" <dnu@fx.ro>
To: <pianotech@ptg.org>
Sent: Sunday, November 23, 2003 3:12 PM
Subject: Cantilever bridges and speaking lengths


> Hello!
>=20
> While looking at some pretty big old pianos (parallel strung) which =
had
> cantilever bass bridges, although they had quite long speaking =
lengths, I
> was wondering how do these features influence the piano's sound? Now I =
did
> read the messages here lately, saying that many of you choose to =
remove
> cantilevers and shorten the speaking lengths.
> But provided that:
> 1. The cantilever isn't excessively long (let's say no more than 10 =
cm) so
> it's stiff enough and doesn't flex;
> 2. The backscale is sufficient (what is the smallest length =
recommendable
> for the backscale of A0?);
> Then, why wouldn't the cantilever make sense for moving the bridge =
footprint
> to a more flexible area of the board and thereby have longer speaking
> lengths?
> In other words, is the gain in speaking length worth loosing [whatever =
you
> loose through a cantilever bridge]? Up to what size, if any, is this a =
good
> trade-off?
>=20
> Now, I know that a floating board could solve this problem, but still, =
it's
> interesting to know if there are any other inherent flaws of =
cantilever
> bridges which I can't see so far.
> I have a Steinway O, under repairs right now, which has a cantilever =
bass
> bridge and a pretty short backscale on A0, yet it has a very deep tone =
in
> the bass. The board also seems to be quite flexible down there, if you =
knock
> on the bass bridge (strings are currently off) it produces a low =
frequency.
>=20
> So, what factors do influence the tone of the low bass and how?
>=20
> Regards,
>=20
>  Calin Tantareanu
> ----------------------------------------------------
>  e-mail: dnu@fx.ro
>  http://calintantareanu.tripod.com
> ----------------------------------------------------
>=20
>=20
>=20
> _______________________________________________
> pianotech list info: https://www.moypiano.com/resources/#archives
> 
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