Composition for rain to head sky rockets, is the same as the above for the rockets.
General Table of Sky Rockets.
| 2 Pound. | 1 Pound. | ¹⁄₂ Pound. | ¹⁄₄ Pound. | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inch. | Inch. | Inch. | Inch. | |||||||||||
| Case | - | Exterior diameter | 2 | .13 | 1 | .69 | 1 | .34 | 1 | .06 | ||||
| Interior diameter | 1 | .529 | 1 | .214 | 0 | .961 | 0 | .761 | ||||||
| Length before driving | 15 | .97 | 12 | .67 | 10 | .05 | 8 | .25 | ||||||
| Length of guage for the choke | 1 | .5 | 1 | .25 | 1 | .0 | 0 | .75 | ||||||
| Cylinders for heading | - | Diameter | 2 | .84 | 2 | .25 | 1 | .79 | 1 | .39 | ||||
| Length | 4 | .26 | 3 | .38 | 2 | .68 | 2 | .12 | ||||||
| Cones for heading | - | Diameter | 2 | .84 | 2 | .25 | 1 | .79 | 1 | .39 | ||||
| Height | 4 | .36 | 3 | .38 | 2 | .68 | 2 | .18 | ||||||
| Mallet for driving—Weight | 1lb. | 3 8oz. | 2 1 | 1 10 | ||||||||||
| No. of Strokes | 31 | 21 | 18 | 13 | ||||||||||
Copper Ladles for filling Sky Rockets.
Length, 1¹⁄₂ the exterior diameter of the case.
Diameter, equals the interior diameter of case.
Circumference, ³⁄₄ the interior calibre of the case.
Sky rockets are driven with composition up to 4¹⁄₂ exterior diameters of the case from the choke; and ¹⁄₅ of a diameter above the composition with good clay. They are bored and reamed up to 3¹⁄₂ diameters.
Dimensions of Sticks for Rockets. General rules.
For rockets from ¹⁄₂ an ounce to one pound, the stick must be 60 diameters of the rocket in length: for rockets from one pound and upwards fifty or fifty-two diameters. Their thickness at top about ¹⁄₂ a diameter, and their breadth very little more. Their square at bottom equal to ¹⁄₂ the thickness at top.