string seating

V T pianovt@yahoo.com
Fri, 15 Apr 2005 11:46:12 -0700 (PDT)


Hi Ric,

Also, remember that the top of the bridge cap is not
parallel to the soundboard surface.  The edge facing
the speaking length is higher than the edge facing the
back scale.

On Don's film, you can see the first pulse coming
toward the bridge like a Tsunami.  It yanks violently
on the bridge pin and one wonders why the bridge pin
doesn't get pulled out after you play a few loud
notes.

Vladan


============================

#3.  The string under tension will not attempt to
define a straight line across the top of the bridge.
It will be forced in that direction by the bridge
pins.  The string under tension will attempt to define
as exact a fulcrum as it can, and will start exerting
pressure onto the edges of the bridge to do so as soon
as tension is applied.  The reverse of this condition
is that the string being forced flat across the bridge
by the pins will attempt to counter this and part of
that countering is to exert an upward force on the
string on the outside side of each pin. The edges of
the bridge are essentially fulcrum points, and as with
all levers... there is an equal and opposite leverage
exerted on both sides of the fulcrum.

Cheers
RicB


		
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