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<div>><font face="Arial" size="-4" color="#000000"> I wasn't aware
that there should be a fan in the angles in the bass</font></div>
<div><br></div>
<div>Because of the angle and close proximity of the hammers it is
advisable</div>
<div>to lessen the angle as you go down the bass. The single strings
certainly</div>
<div>do not need much. The greater the angle, the tighter the
clearance.</div>
<div><br></div>
<div>For an A I would probably bore:</div>
<div>Degrees,Hammer count</div>
<div>Bass notes 1 - 20</div>
<div>5,6</div>
<div>6,2</div>
<div>7,2</div>
<div>8,2</div>
<div>9,2</div>
<div>10,3</div>
<div>11,3</div>
<div>Tenor notes 21 - 51</div>
<div>11,4</div>
<div>10,4</div>
<div>9,3</div>
<div>8,3</div>
<div>7,3</div>
<div>6,2</div>
<div>5,2</div>
<div>4,2</div>
<div>3,2</div>
<div>2,2</div>
<div>1,2</div>
<div><br></div>
<div>If the hammers are really tight together at the top of the bass
and you don't</div>
<div>want to make then more narrow you could bore 10,2 & 11,2 and
increase 5,8.</div>
<div><br></div>
<div>In the tenor you could bore 11,3 & 10,3 and increase 6,3 &
5,3. Or you can</div>
<div>adjust the groupings to end up at 90 degrees lower in the scale.
Your call,</div>
<div>there is room to play.</div>
<div><br></div>
<div>I don't think there's a hard and fast rule except for having the
hammers</div>
<div>as parallel to the strings as possible for unicorda but I find
that boring</div>
<div>above 11 degrees poses clearance problems.</div>
<div><br></div>
<div>For pianos which have strings that are severely angled I don't
try to match</div>
<div>hammer angle to string angle. I've seen original hammers
bored to 16 degrees</div>
<div>but opted not to duplicate.</div>
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<div><br>
Regards,<br>
<br>
Jon Page</div>
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