I've been de-flowered. Looks like a Bosey. I can't quite get all the details from the pictures. The photo showing the 3 lams makes it look like there all going the same way. I'm assuming they're 90. Do you glue them up flat, I mean, you could glue up a crown with no ribs, like the bottom panel would act as ribs. No, that's not right, the grain would have to be opposite the top panel. But, I would think less rib support would be needed if the panel were glued up in a dish. What do I know? I said something stupid in another post to Jude earlier I have to go correct, about not worrying about shear failure. Then I remembered all those ribs that come loose, now isn't that a shear failure? Have fun in the sun, Terry. It looks like you sanded thought to a glue line in one photo, I can't tell, maybe I'll invite myself over something, I'm good at that. Ask Dale E. or Richard Wheeler. Fenton ----- Original Message ----- From: Farrell To: Pianotech List Sent: Tuesday, January 29, 2008 12:59 PM Subject: Re: Laminated panels (Farrell) Fenton Murray wrote: > Wouldn't missing this detail in the glue up be less of an issue than missing > it in a solid panel. One big advantage of laminating is to reduce the effect > of flaws in individual laminations. One disadvantage to laminating a panel I > would think would be the glue up process itself, the application of even > pressure over a panel would require a serious press, I haven't seen it done. > An amateur attempt could definitely be a failure. Or a first attempt could bring good success! Look at the pictures below. Consider your eyes virgin no more Fenton. Now you have seen it! Plastic bag, vacuum pump, hose, power, a little magic dust and you're done! 15 psi perfectly evenly applied to every square inch of panel. This simple setup applies a total of about 30,000 pound of clamping pressure to the panel face. That's like parking 5 or 6 big SUVs on the panel! Serious, yes. Complicated, no. Just like we did the laminated ribs in the class demonstration in Rochester - only bigger! I agree with you regarding minimizing flaws in wood by laminating - not only will one reduce the effect of any flaws present, one can also do a better job of identifying small flaws (knots, pitch pockets, insect damage, etc.) and eliminate those pieces. Terry Farrell Tapering at the tail - you can see the two offset grain directions. -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20080129/80c8a496/attachment-0001.html -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/jpeg Size: 41073 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/20080129/80c8a496/attachment-0005.jpe -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/jpeg Size: 33253 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/20080129/80c8a496/attachment-0006.jpe -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/jpeg Size: 24308 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/20080129/80c8a496/attachment-0007.jpe -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/jpeg Size: 28144 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/20080129/80c8a496/attachment-0008.jpe -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/jpeg Size: 35268 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/20080129/80c8a496/attachment-0009.jpe
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