Classical nylon falcate CF V3

	A	B	C	D	E	F
1	An implementation of several formulas from the book "Contemporary Acoustic Guitar" by Trevor Gore and Gerard Gilet. Copyright 2025 by Gregory Holmberg, mailto:gregory.holmberg@gmail.com License: Creative Commons Attribution-ShareAlike 4.0 International You may copy and modify this spreadsheet, but always keep this copyright and the link to the original and to the documentation.
2	Original	Documentation		Wood Properties spreadsheet
3
4	Property	Value	Units	Notes	Imperial
5	Name	Neo-classical flat-top		Follows the parameters of Table 2.4-1.
6	Description	360 mm nylon-string, falcate braces		Top: Western Red Cedar with KBP+CF braces; back: EIR
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8	Body
9	Neck join	12	fret
10	Length	490.0	mm		19.29	in
11	Width	360.0	mm	Of lower bout.	14.17	in
12	Depth	121.0	mm	At the tail.	4.76	in
13	Cross section	43	mm² E-3	Cross-sectional area of lower bout.	67	in²
14	Volume	13.4	liters		820	in³
15	Sound hole	84.0	mm	Diameter	3.31	in
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17	Species, top	Western Red Cedar	G16
18	Species, brace	KBP+CF
19	Thickness, top	2.49	mm
20	Mass, top	118	g		4.2	ozm
21	Effective mass, top	43	g		1.5	ozm
22	Effective area, top	38,989	mm²	The size of the "piston".	60	in²
23	Stiffness, top	42,739	N/m
24	Uncoupled freq, top	186	Hz
25	Monopole mobility, top	23.3	s/kg e-3	MM as defined in the book.
26	Full MM, top	19.9	s/kg e-3	MM including V and At.
27	Average SPL	75.2	dB
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29	Species, back	East Indian Rosewood	G27
30	Species, brace	Sitka Spruce
31	Thickness, back	2.08	mm
32	Mass, back	190	g		6.7	ozm
33	Effective mass, back	83	g		2.9	ozm
34	Effective area, back	38,403	mm²	The size of the "piston".	60	in²
35	Stiffness, back	135,564	N/m
36	Uncoupled freq, back	214	Hz
37	Kb/Kt	3.2
38	Monopole mobility, back	9.4	s/kg e-3	MM as defined in the book.
39	Full MM, back	8.9	s/kg e-3	MM including V and At.
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41	Air	95.0	Hz	Coupled Helmholtz frequency in the sound hole, T(1,1)1.
42	Top	190.5	Hz	Coupled top monopole mode frequency, T(1,1)2.
43	Back	240.0	Hz	Coupled back monopole mode frequency, T(2,1).
44
45	Neck
46	Species	Honduran mahogany
47	Scale	650.0	mm		25.59	in
48	Frets	18
49	Nut width	52.0	mm		2.05	in
50	Depth at nut	21.0	mm		0.827	in
51	Depth at F9	24.0	mm		0.945	in
52	String spread	58.0	mm	at saddle	2.28	in
53	Radius at nut	500	mm		19.69	in
54	Radius at F18	619	mm		24.37	in
55	Radius at saddle	684	mm		26.93	in
56	Strings	12, 16, 24, 32, 42, 53	in	D.Addario EJ45, nylon/silver, normal tension
57	Intonation error	2.9	cents	Total error over all strings, all frets.
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