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#1
10-09-2013, 02:14 PM
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Calculating Radius Dishes
I'm looking to build some radius dishes and I'm not much of a math guy (ut oh), I'm curious how I'd calculate out a perfect radius. Say for example I was doing a 15 foot radius and wanted to print out a radius with perfect dimensions on a computer. Anybody know how I'd go about doing this?
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#2
10-09-2013, 02:32 PM
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Draw a straight line, and mark the beginning of the curve. Then for any distance along the line(L), the distance to the curve is the square root of the Radius squared minus L squared.
offset=(R^2-L^2)^.5 Search tangent offset in surveying practices.
__________________
Rodger Knox, PE 1917 Martin 0-28 1956 Gibson J-50 et al
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#3
10-09-2013, 03:39 PM
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Thanks Rodger, that's a big help! Looking forward to adopting some of the new ways everybody else does it ...kinda ironic seeing as I'm one of the younger guitar builders out there.
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#4
10-09-2013, 05:02 PM
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Rodger, given your definitions, I came up with:
offset = R - SQRT(R^2-L^2) for L < R Am I missing something? Last edited by Trevor Gore; 10-09-2013 at 05:45 PM. Reason: Checking the math!
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#5
10-10-2013, 01:51 AM
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Quote:
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#6
10-10-2013, 11:24 AM
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Quote:
__________________
Rodger Knox, PE 1917 Martin 0-28 1956 Gibson J-50 et al Last edited by Rodger Knox; 10-10-2013 at 11:47 AM.
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#7
10-10-2013, 05:58 PM
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