Hi Richard. I woke up in the middle of the night realizing that I had way-over simplified things with my example. What I said would be true if the bottom of the bridge pin were anchored firmly and could not move at all - that way it would be the pivot point for the bridge pin wanting to tip over from string pressure. In real life this would not be true I suppose. There would likely be forces similar to a tuning pin where at some point below the surface of the bridge there is a fulcrum point where the bridge pin wants to teeter-totter the other way. But let's not go there......way too early........and school was such a long time ago.........more coffee! Terry Farrell ----- Original Message ----- From: "Richard Brekne" <Richard.Brekne@grieg.uib.no> To: <pianotech@ptg.org> Sent: Friday, August 02, 2002 4:54 AM Subject: Re: CA gluing Grand Pinblocks....My take on it/ Richard Brekne > Actually.... thats a perfect explaination Terry. Says > exactly what I was trying to say about there being pretty > much the same situation glue or not, in a much clearer > fashion then I was able to. > > The only question I have left then is how significant the > changes are. They would seem very slight unless you really > used a lot of glue. But ok. I got all this clear now. > Thanks. > > But surely this isnt what Joe was refering to in his > origional point about the shear stress on the pin from the > string pushing against it and the bridge resisting. I cant > see how that gets much directly into the question of bridge > cracking... with or without CA. > > > Cheers ! > RicB
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