[CAUT] Digest, Vol 1103, Issue 85 Moving Wippen Rail

[David Love]

Another question, is it best to have the jack start out at 90 degrees to the
shank, or is it better to have the jack pass through 90 degrees to the shank
at, say, half blow.  

 

David Love
davidlovepianos at comcast.net
www.davidlovepianos.com 

-----Original Message-----
From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Jon
Page
Sent: Monday, October 29, 2007 12:53 PM
To: caut at ptg.org
Subject: [CAUT] Digest, Vol 1103, Issue 85 Moving Wippen Rail

 

It  should be very perpendicular to the shank with the back side of the jack


running an extension of the line of the back side of the knuckle core. Not a

lot of room for moving this around unless you want to introduce friction
problems.

 

consider this:  A right triangle

Short arm = jack center to jack tip.

Long arm = knuckle core to hammer molding center line

                   (line drawn parallel to shank from jack tip)

Hypotenuse = optimum spread?

 

Or is this triangle measured to shank center.  I don't have the time now to

look into this.

 

Just a passing thought.

-- 


Regards,

Jon Page

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