<table cellspacing="0" cellpadding="0" border="0"><tr><td valign="top" style="font: inherit;"><div>Thanks, Ron.<br />     And the Knabes I have here seem to have laminated ribs throughout. (Though it is very hard to tell, because it is just 2 laminations per rib, and the joints are so cleanly made.) <br /><br />Thumpe</div></td></tr></table>            <div id="_origMsg_">
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                                <span style="font-weight:bold;">From:</span>
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                            Ron Nossaman &lt;rnossaman@cox.net&gt;;                            <br>
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                                <span style="font-weight:bold:">To:</span>
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                             &lt;pianotech@ptg.org&gt;;                                                                                                     <br>
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                                <span style="font-weight:bold:">Subject:</span>
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                            Re: [pianotech] GH-1s                            <br>
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                                <span style="font-weight:bold;">Sent:</span>
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                            Thu, Dec 20, 2012 8:57:03 PM                            <br>
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                                        <td valign="top" style="font:inherit;">On 12/20/2012 1:14 PM, Euphonious Thumpe wrote:<BR>&gt; As I sit in awe of this discussion (barely comprehending half of it!) I<BR>&gt; feel nevertheless inspired to inquire about the use of laminated ribs,<BR>&gt; and how they may provide some of the elasticity of "feathering", without<BR>&gt; so much loss of desirable strength?<BR>&gt; <BR>&gt; Thumpe<BR><BR>Laminated ribs tend to be more uniform and predictable, and just a bit stiffer. Otherwise, there's nothing magic about them. They aren't leaf springs, and act like solid wood when bent.<BR><BR><BR>&gt; P.S. The 1890's Knabes that I have use laminated ribs that are wide and<BR>&gt; shallow: seeming to indicate, to me at least, that wide ribs are NOT<BR>&gt; necessarily an indication of a purely CC board; but rather that this<BR>&gt; arrangement was chosen to provide a wide glue surface ( perhaps also<BR>&gt; wise because
 of the brittleness of hide glue) and make best use of a<BR>&gt; laminated rib's elasticity, without the undue stiffness that I suspect<BR>&gt; taller ribs would impart.<BR><BR>Stiffness isn't necessarily "undue", and whether the rib is laminated, crowned or not, panel compression will still help the rib support load. I've seen laminated and crowned ribs in the treble of old Knabes.<BR>Ron N<BR></td>
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