In a message dated 12/6/2003 6:15:54 PM Eastern Standard Time, 
[EMAIL PROTECTED] writes:


> When an open valve is depressed initially it is at 135 degrees to the 
> center. 
> This is in turn 45 degrees from the radial line. What would that Torque be? 
> It would be 
> 

You know, I hate to prolong this sorry mess but I take exception to this 
premise.  The whole purpose of the mini-ball linkage is to connect a ball to the 
rotor stop via a concave linkage with negative radius.  The linkage applies the 
same torque to the mini-ball throughout the throw UNLESS the linkage is 
designed or installed improperly.  You have a sphere (positve radius) connected to 
the concave linkage (negative radius), but the radii are constant.  Why would 
the radial line change?

By the way, mini-ball linkages can be adjusted to accomplish different 
spatula heights.  The adjust depends on the brand of linkage, and is easy to 
accomplish.

Either linkage is subject to problems over time, both linkages perform well 
when installed and maintained properly.  I prefer string, you prefer string, he 
prefers mechanical, she likes both, but we all like the music.

Dave Weiner
Brass Arts Unlimited
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