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| Those waiting on the OLF SJ plans http://w-ww.luthiersforum.com/forum/viewtopic.php?f=10102&t=8170 |
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| Author: | Michael Dale Payne [ Fri Aug 25, 2006 2:45 am ] |
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I have what I think is good news. I was able to get revised files that have my redesigned X-back brace to Lance before he sent the order out for printing. This revision has more of a Star shaped lower bout back brace option as apposed to the first iteration that had an 86deg X shaped back brace option. This revision supports the dome on the lower bout of the back better. I hope everyone enjoyes 
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| Author: | JBreault [ Fri Aug 25, 2006 6:56 am ] |
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Michael (or anyone else), do you think this type of back bracing would work for an OM style instrument? How do you think it affects the tone vs. a typical ladder brace design? I'm just curious because I think it looks really cool...I know that isn't much of a reason for doing something...but I'd like to know anyway. |
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| Author: | Michael Dale Payne [ Fri Aug 25, 2006 7:08 am ] |
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I do a simple X back brace on an OM. In fact the OLF OM plans shows my X-back brace option as well. The tonal affect my be subjective but I feel like it make the high end stand out more by making the back a bit more ridgid. |
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| Author: | RichB [ Fri Aug 25, 2006 10:37 am ] |
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[QUOTE=MichaelP] This revision has more of a Star shaped lower bout back brace option as apposed to the first iteration that had an 86deg X shaped back brace option.[/QUOTE] Michael, I have a set of the 'old OLF SJ plans'. What does this means in relation to the new plans. Are the old plans for the X-brace OK & should I just leave them as is. Or, are there revisions that can/should be made, to bring them up-to-date? Is it just a matter if increasing the X-brace 4deg to bring it up to the new design specs? Or, would it be safer, if I just went w/ the conventional back bracing pattern since I am just beginning out? |
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| Author: | Michael Dale Payne [ Fri Aug 25, 2006 2:53 pm ] |
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There is no structural failure issues with the old plans back X brace but right near the apex of the lower bout the old x brace would allow the dome to flatten about 1/2" from the edge a bit. This was due to lack of a structural member to give the shape in that area. So I increase the angle of the X to 90 degs and added a spar on either side at the apex of the X that solved the flatting of the dome near the edge of the Lower bout apex. That was the only reason for the change if you look at the pic I included it is easy to see what I did and why. There has been no noticeable change in the tone but I have only done the new system on 3 so far. But it does make a big difference in the shape of the backs dome. Much better now. |
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