Rockets

Composition. | Old proportion. | New proportion. | | lbs. | oz. | | lbs. | oz. | | Saltpetre | 4 | 0 | —— | 4 | 4 | | Sulphur | 1 | 0 | —— | 0 | 12 | | Charcoal | 1 | 8 | —— | 2 | 0 | Composition for the Stars. | Mealed powder | 0 | lb. | 8 | oz. | | Saltpetre | 8 | | 0 | | | Sulphur | 2 | | 0 | | | Antimony | 2 | | 0 | | | Isingla di olved | 0 | | 3 | ¹⁄₂ | | Spirits of wine | 1 | pint. | | Vinegar | 1 | quart. | 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 thickne at top about ¹⁄₂ a diameter, and their breadth very little more. Their square at bottom equal to ¹⁄₂ the thickne at top. | Kind of Rockets. | 6 Pr. | 4 Pr. | 2 Pr. | 1 Pr. | ¹⁄₂ Pr. | ¹⁄₄ Pr. | ¹⁄₈ Pr. | | ft. | in. | ft. | in. | ft. | in. | ft. | in. | ft. | in. | ft. | in. | ft. | in. | | Distance of poise from the point of the cone | 4 | 1¹⁄₂ | 3 | 9 | 2 | 9 | 2 | 1 | 1 | 10¹⁄₂ | 1 | 8 | 1 | 3 | Rockets of between 3 and 4 inches diameter have been observed to ascend as high as 1000 or 1200 yards; but the height of common rockets is between 450 and 600 yards; and their flight usually short of 7 seconds.