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<DIV><FONT face=Arial size=2>You still don't know for sure because =
you don't
know how the rib was originally shaped. I assume you mean the "face" to =
be the
surface glued to the panel and the spine is the opposite surface. What =
if the
"face" was straight and the "spine" was contoured (feathered) =
originally.
Dry down a panel and glue on the ribs. Let the board develop its =
compression
crowning and now you have a curved straight "spine" and a curved
"face".</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Terry Farrell</FONT></DIV>
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<DIV><FONT face=Arial size=2>Terry asked: "<FONT face="Times New =
Roman"
size=3> How can you =<BR>determine that? If the rib is curved, =
could it still
not be from panel =<BR>compression? You may well be correct, but I =
just don't
see how one could =<BR>be so sure.<BR><BR>Terry,</FONT></FONT></DIV>
<DIV><FONT face=Arial size=2><FONT face="Times New Roman" =
size=3>It's simple.
Use a straight edge. If the rib "face" is curved and the "spine" is =
straight,
then the rib has a machined "crown". With an olde piano, the "spine" =
may be
curved the other way. Still a machined-in
crown.<G> </FONT></FONT></DIV>
<DIV><FONT face=Arial size=2>Joe Garrett, R.P.T.<BR>Captain, Tool
Police<BR>Squares R I</FONT></DIV></BLOCKQUOTE></BODY></HTML>