| Official Luthiers Forum! http://mowrystrings.luthiersforum.com/forum/ |
|
| Stauffer Style back radius http://mowrystrings.luthiersforum.com/forum/viewtopic.php?f=10101&t=51184 |
Page 1 of 1 |
| Author: | Fasterthanlight [ Fri Nov 02, 2018 11:14 am ] |
| Post subject: | Stauffer Style back radius |
Anyone have any idea what kind of radius the back of a stauffer / austro-german martin would be? I have the plan from stew mac but it is not written on it... i can tell it is smaller than 15' as my 15' template does not match up. Any help would be great. Best. G. |
|
| Author: | Clay S. [ Sun Nov 04, 2018 8:17 pm ] |
| Post subject: | Re: Stauffer Style back radius |
I did a quick measurement on a couple of old German guitars from that period. Laying a straight edge across an 11 1/2 inch wide back the gaps on either edge measured about 1/4 inch. |
|
| Author: | Fasterthanlight [ Tue Nov 06, 2018 3:56 pm ] |
| Post subject: | Re: Stauffer Style back radius |
Clay S. wrote: I did a quick measurement on a couple of old German guitars from that period. Laying a straight edge across an 11 1/2 inch wide back the gaps on either edge measured about 1/4 inch. Thanks... now the question is how to figure out what radius that translates as. |
|
| Author: | Clay S. [ Tue Nov 06, 2018 7:09 pm ] |
| Post subject: | Re: Stauffer Style back radius |
If you are less concerned about having a circular curve and go with a spline curve you can just bend a thin batten 1/4 inch below a line drawn through two nails spaced 11 1/2 inches apart. Although it won't tell the radius it will give you a curve that the wood will conform to more easily and minimize problems with end point stiffness. |
|
| Author: | whiskywill [ Wed Nov 07, 2018 11:33 am ] |
| Post subject: | Re: Stauffer Style back radius |
Clay S. wrote: I did a quick measurement on a couple of old German guitars from that period. Laying a straight edge across an 11 1/2 inch wide back the gaps on either edge measured about 1/4 inch. Using those figures I have just drawn it in Autocad and the measured radius is 1682mm or 66.22" or 5.5ft. |
|
| Author: | Fasterthanlight [ Wed Nov 07, 2018 2:24 pm ] |
| Post subject: | Re: Stauffer Style back radius |
For those interested i found this - https://www.mathopenref.com/arcradius.html Using this and measurements from the plan i found it to be 8.7ft. Thanks for the help guys!! |
|
| Page 1 of 1 | All times are UTC - 5 hours |
| Powered by phpBB® Forum Software © phpBB Group http://www.phpbb.com/ |
|