Because in proportion to the decrease of windage there will be less space for the reflections of the shot along the bore, and consequently less injurious power exercised upon it.
5. What is the loss of velocity by a given windage proportional to?
It is directly as the windage, and inversely as the diameter of the bore very nearly.
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6. What is the loss of velocity by the windage of the ball?
| KIND OF GUN. | Charge of powder. | Initial velocity of ball. | Loss of velocity by windage of 1-40th diam. | ||
|---|---|---|---|---|---|
| Without windage. | With windage of 1-40th diam. | ||||
| lbs. | feet. | feet. | feet. | per cent. | |
| 32-pdr. Sea-Coast, | 4 | 1444 | 1271 | 173 | 12 |
| 24-pdr. Siege, | 4 | 1600 | 1433 | 167 | 10 |
| 6 | 1890 | 1723 | 167 | 9 | |
| 12-pdr. 25 calibres, | 2 | 1617 | 1444 | 173 | 11 |
| 3 | 1915 | 1742 | 173 | 9 | |
| 4 | 2124 | 1951 | 173 | 8 | |
| 12-pdr. Field, 16 calibres, | 2 | 1528 | 1370 | 158 | 10 |
| 3 | 1793 | 1635 | 158 | 9 | |
| 4 | 1992 | 1834 | 158 | 8 | |
| 6-pdr. Field, | 1.5 | 1734 | 1560 | 174 | 10 |
7. What windage is allowed to guns?
| IRON. | BRASS. | |||||
|---|---|---|---|---|---|---|
| Sea-Coast. | Siege and Garrison. | Field. | ||||
| 42 | 32 | 24 | 18 | 12 | 12 | 6 |
| inches. | inches. | inches. | inches. | inches. | inches. | inches. |
| 0.16 | 0.15 | 0.14 | 0.13 | 0.10 | 0.10 | 0.09 |
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8. What windage is allowed to columbiads and howitzers?