"Megan"

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Name of Harp:
Harp designed by:
Analyzed by:
Date of analysis:

Number of strings:
Pitch Range:
String spacing:
Distance between o/c of high & low strings:
Center strip string hole o/c distance:
Strings enter soundboard at:

Length of e'' string:
Length of e string:
Estimated overall height:
Estimated overall depth:

Appx. Total Tension
Assumed max. soundboard bow:
String coordinates based on:

Tuning pin type:
Diam. of tuning pin at string-side neck:
Rotation to tighten (string side):
Height of tuning pin over bridge pin (str. 1):
Height of tuning pin over bridge pin (str. 30):
# Small bdg. pins:
# Large bdg. pins (All Wound):
String-bridge pin attack angle:
 


The advantage of this peachy layout is that it requires no wound strings and is therefore an inexpensive design to produce.  Along with the "Dani" layout, it can be used for a variety of unique lyre or harp designs.  Use your imagination.

15-String "Megan"
Dan Cady - HyperHarp
HyperHarp
8/25/99

15
e'' to e
.464-.567 (variable)
7.684"
15.3689"
30 deg.

13"
38 3/4"
47"
14"

475
.612"
Nominal

Tapered
0.25"
Counter-clockwise
1.25"
1.625"
15
None
15 deg.

"Juluka-20"
"Michelle-30"
"Rue Bear-31"
"LSC-36"
"Mariathan-39"
"Sparky-43!"
 

15 String "Megan"

Help!


Str#
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Note
e''
d''
c''
b'
a'
g'
f'
e'
d'
c'-m
b
a
g
f
e
Hz
659.26
587.32
523.26
493.88
440
392
349.23
329.63
293.66
261.63
246.94
220
196
174.615
164.815
Length
13
14.2636
15.5828
16.9676
18.4192
20.0671
21.783
23.5737
25.4398
27.375
29.3792
31.4601
33.7998
36.2215
38.7254
Type Diam
Nyn 32
Nyn 32
Nyn 36
Nyn 36
Nyn 36
Nyn 36
Nyn 40
Nyn 40
Nyn 40
Nyn 45
Nyn 45
Nyn 50
Nyn 55
Nyn 60
Nyn 60
Ten
24
22
27
28
27
25
29
30
28
32
33
37
42
45
46
%Max
66
63
59
63
59
55
52
54
50
46
47
43
39
36
36
T/L
1.8462
1.5424
1.7327
1.6502
1.4659
1.2458
1.3313
1.2726
1.1006
1.1689
1.1232
1.1761
1.2426
1.2424
1.1879
Delta*
0.6939
0.6472
0.789
0.829
0.7536
0.6867
0.8048
0.8324
0.7382
0.8777
0.8895
1.0127
1.1319
1.2316
1.2384
SBHole**
0
0.992
1.988
2.988
3.988
5.0686
6.1531
7.2417
8.3303
9.4239
10.5224
11.626
12.8653
14.1146
15.3689
XStr
3.3802
3.8762
4.3742
4.8742
5.3742
5.9145
6.4568
7.0011
7.5454
8.0922
8.6414
9.1932
9.8129
10.4375
11.0647
YStrSB
-11.4754
-12.3345
-13.197
-14.0631
-14.9291
-15.8649
-16.8041
-17.7469
-18.6896
-19.6367
-20.5881
-21.5438
-22.617
-23.6989
-24.7852
YStrTop
1.5246
1.9291
2.3858
2.9045
3.4901
4.2022
4.9789
5.8268
6.7502
7.7383
8.7911
9.9163
11.1828
12.5226
13.9402
XBdgPin
3.3341
3.8301
4.3281
4.8281
5.3281
5.8684
6.4107
6.955
7.4992
8.046
8.5953
9.1471
9.7667
10.3914
11.0185
XT-Pin
3.1703
3.6591
4.1499
4.6427
5.1356
5.6687
6.2038
6.7409
7.278
7.8177
8.3597
8.9043
9.5168
10.1343
10.7543
YT-Pin
2.7746
3.2059
3.6893
4.2349
4.8473
5.5861
6.3896
7.2643
8.2145
9.2294
10.309
11.461
12.7542
14.1208
15.5652
YLvr***
0.7947
1.1283
1.5108
1.9518
2.4559
3.0755
3.7558
4.5032
5.3218
6.2013
7.1415
8.1499
9.285
10.4888
11.7658

* Delta is a trigometric HyperHarp function involving the force to displace strings at constant angle of approximately 1 degree as a relations to the string mass and diameter.  I use it to choose smoothest transition strings when several types will fulfill T/L limits.
** Lineal measure from high to low note down the face of soundboard or diagonal bridge.
*** Approximate, depending on belly

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