(15)
The length of the shot being denoted by l and the calibre by d, and the length in calibres by x
l / d = 2a / 2b = x,
(16)
| A0 = | x | ch−1x − | 1 | , |
| (x2− 1)3/2 | x2 − 1 |
(17)
| 2B0 = | − x | ch−1x + | x2 | , |
| (x2 − 1)3/2 | x2 + 1 |
(18)
| x2A0 + 2B0 = | x sh−1 √ (x2 − 1) | = | x | log [ x + √ (x2 − 1) ]. |
| √ (x2 − 1) | √ (x2 − 1) |
(19)