This will be a calculator for proofing spirits in accordance with Federal standards. The method uses tables established by the Tax and Trade Bureau. The data set is large; 1 to 200 proof over a temperature range of 70 degrees (F) in one degree increments. Ethanol and water mixing are not trivial, hence the tables. The Europeans use an equation with over 60 coefficients!
There are two problems.
1. Find the true proof, standardized at 60 degrees. For example, from Table 1, if the proof is measured at 126 (abv) at a temp of 70F; the proof at 60F is 122.2
2) Find the respective volumes of ethanol and water for that proof from Table 6. At 122 proof the volumes will be 61 parts ethanol and 42.69 parts water. Which will result in 100 parts of mix. Then simple math to determine how much water to to add to reach 80 proof, for example.
Table 1
61° 62° 63° 64° 65° 66° 67° 68° 69° 70°
126 125.6 125.2 124.9 124.6 124.1 123.7 123.3 123.0 122.6 122.2
127 126.6 126.2 125.9 125.6 125.1 124.7 124.3 124.0 123.6 123.2
128 127.6 127.2 126.9 126.5 126.1 125.7 125.3 125.0 124.6 124.2
129 128.6 128.2 127.9 127.5 127.1 126.7 126.4 126.0 125.6 125.2
130 129.6 129.2 128.9 128.6 128.1 127.7 127.4 127.0 126.6 126.2
131 130.6 130.2 129.9 129.5 129.1 128.8 128.4 128.0 127.6 127.2
Table 6
Proof Alc Vol Water Vol
120 60.00 43.71
121 60.50 43.20
122 61.00 42.69
123 61.50 42.18
124 62.00 41.67
125 62.50 41.16
My instinct is to put the table data in arrays. It's what I know. But the way I see it is 70 arrays of 200 elements and 200 arrays of 3 elements. Is that a reasonable construct/approach? Is there a better method I should be considering? Thanks for advice.
