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This commit is contained in:
Connor Olding 2014-10-02 00:54:55 -07:00
parent 115a30cc5b
commit 3aae7d6c1d
2 changed files with 22 additions and 2 deletions
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3
data.py
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@ -45,13 +45,16 @@ daddario_nickle_wound = ( # XL
('DANW032' , .00019347), ('DANW032' , .00019347),
('DANW034' , .00021590), ('DANW034' , .00021590),
('DANW036' , .00023964), ('DANW036' , .00023964),
('DANW037*', .00024872), # from the EXL115BT, an approximation
('DANW038' , .00026471), ('DANW038' , .00026471),
('DANW039' , .00027932), ('DANW039' , .00027932),
('DANW040*', .00029570), # from the EXL120BT, an approximation
('DANW042' , .00032279), ('DANW042' , .00032279),
('DANW044' , .00035182), ('DANW044' , .00035182),
('DANW046' , .00038216), ('DANW046' , .00038216),
('DANW048' , .00041382), ('DANW048' , .00041382),
('DANW049' , .00043014), ('DANW049' , .00043014),
('DANW050*', .00044720), # from the EXL115BT, an approximation
('DANW052' , .00048109), ('DANW052' , .00048109),
('DANW054' , .00053838), ('DANW054' , .00053838),
('DANW056' , .00057598), ('DANW056' , .00057598),

21
strings.py
View file

@ -112,16 +112,33 @@ def tension2uw(t, freq):
return (t*uw_const)/(2*scale_length*freq)**2 return (t*uw_const)/(2*scale_length*freq)**2
if False: if False:
# DAd's data is all screwy so we use change scale lengths for a best-fit
scale_length = 25.4825 scale_length = 25.4825
D3 = note2freq('D3') D3 = note2freq('D3')
A2 = note2freq('A2')
E2 = note2freq('E2')
print('NW024 {:10.8f} == 0.00010857'.format(tension2uw(15.73, D3))) print('NW024 {:10.8f} == 0.00010857'.format(tension2uw(15.73, D3)))
print('NW025* {:10.8f} == ? '.format(tension2uw(17.21, D3))) print('NW025* {:10.8f} == ? '.format(tension2uw(17.21, D3)))
print('NW026 {:10.8f} == 0.00012671'.format(tension2uw(18.38, D3))) print('NW026 {:10.8f} == 0.00012671'.format(tension2uw(18.38, D3)))
print()
print('NW036 {:10.8f} == 0.00023964'.format(tension2uw(19.04, A2)))
print('NW037* {:10.8f} == ? '.format(tension2uw(20.23, A2)))
print('NW038 {:10.8f} == 0.00026471'.format(tension2uw(20.96, A2)))
print()
scale_length = 25.18
print('NW039 {:10.8f} == 0.00027932'.format(tension2uw(12.46, E2)))
print('NW040* {:10.8f} == ? '.format(tension2uw(13.18, E2)))
print('NW042 {:10.8f} == 0.00032279'.format(tension2uw(14.37, E2)))
print()
scale_length = 25.02
print('NW049 {:10.8f} == 0.00043014'.format(tension2uw(18.97, E2)))
print('NW050* {:10.8f} == ? '.format(tension2uw(19.68, E2)))
print('NW052 {:10.8f} == 0.00048109'.format(tension2uw(21.15, E2)))
import sys import sys
sys.exit(0) sys.exit(0)
outfmt = '{:<6} at {:> 5.2f} lbs ({:>+4.2f})' outfmt = '{:<8} at {:> 5.2f} lbs ({:>+4.2f})'
finalfmt = 'total: {:>7.2f} lbs ({:>+5.2f})' finalfmt = 'total: {:>7.2f} lbs ({:>+5.2f})'
def print_ideal_stock(strings): def print_ideal_stock(strings):
total_tension = 0 total_tension = 0
total_desired_tension = 0 total_desired_tension = 0