what are the top and back radius on a Martin D28 Dreadnaught? I was I check myself before I go any farther.
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| radius on Martin D28 http://mowrystrings.luthiersforum.com/forum/viewtopic.php?f=10102&t=14062 |
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| Author: | Greenman [ Sun Oct 14, 2007 10:50 am ] |
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| what are the top and back radius on a Martin D28 Dreadnaught? I was I check myself before I go any farther.
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| Author: | David Collins [ Sun Oct 14, 2007 11:10 am ] |
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28' top, 20' back. Modern ones anyway. |
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| Author: | David Collins [ Sun Oct 14, 2007 12:35 pm ] |
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I think you may be right on that Todd. I'm recalling that info from last time I cared much about what Martin did, which was at least 10 years ago. 
But really, now that you mention it 25' does sound right for the backs. |
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| Author: | Don A [ Sun Oct 14, 2007 12:53 pm ] |
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Todd has it right. 28/25 for D and 28/20 for smaller. |
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| Author: | Greenman [ Sun Oct 14, 2007 1:01 pm ] |
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 So that is the size radius discs I need for this projects? I want to use the discs for sanding the kerfing and making the braces as well. Is there an easier way?
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| Author: | Don A [ Sun Oct 14, 2007 1:15 pm ] |
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Bill, you can use a sanding board for the kerfing but the dishes are the easiest way for me. Look at the StewMac directions for building a sanding board. StewMac directions. For the braces you can make a template and radius using a router with a pattern bit or plane or you can use the Brace Maker sold by Luthier Suppliers. Brace Maker. If you plan to build more than 1 guitar the investment in dishes is well worth it. They are also good tools to glue the braces to the top/back and also the top/backs to the shell using a gobar deck. |
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| Author: | billm [ Sun Oct 14, 2007 4:09 pm ] |
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Hey guys - Is there a rule of thumb about how to apply an appropriate radius to designs. I made myself a 15' and 30' dish for my last build (wasn't that hard, just took some math, some plywood, a router, some earplugs, a couple of hours' time, and a good shower afterwards). The last build was an OM; now I'm planning something bigger (20" length and 16.25" width), but was planning on using the dishes I have. Would different radii be more appropriate for a larger guitar? How do you determine this? Because, honestly, although the dishes weren't hard to make, I'd like to avoid the complaining from the wife about the noise... |
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| Author: | Don A [ Mon Oct 15, 2007 4:12 am ] |
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When I asked that question here a few years ago, I was told as a very general rule that the more dome the more projection, and the flatter the dome the more warmth. |
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