bearing, loose bridge pins leading to Wapin considerations

[Tim Coates]

Hi Ron,

Thanks for your clarifications.  Hope your can meet Bob Coleman sometime.

Tim Coates
Wapin Co., LLP

Ron Nossaman wrote:

> >Your statement,  "the string on a vertical pin will be less likely to be
> >seated on the bridge as
> >the bridge shrinks" isn't clear concerning a Wapin bridge.  You haven't
> >indicated whether your model has the standard Wapin configuration.
>
> Just because there is no clamp at the vertical pin

>
>
> >As far as I know, it
> >has been the experience of all involved with Wapin that the strings stay
> >seated to the bridge better with the Wapin configuration.
>
> Better than what? And how determined?

>
>
> >As some have been stating in this thread, seating the middle of the bridge is
> >a desirable thing.  The trapping pin helps the string stay seated to the
> >middle of the bridge, that seems to be holding true.
>
> I don't think pins ever become un-seated from the middle of the bridge
> unless there is negative bearing, trapping pin or not.
>
> > I would like to see your data for a standard Wapin Bridge, not just a
> >perpendicular front pin.  There is a difference.
>
> The data I have is what I posted regarding friction and pin angles. I have
> no information specific to Wapin.
>
> >As we have some true scientists studying the Wapin Bridge, I myself am not
> >totally up to speed all the data we at Wapin have.  Michael Wathen is
> >presently uploading some of Bob Coleman's (NASABob) data onto our website.
>
> Looking forward to seeing it.
>
> Ron N