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A quarter stick is a large firecracker that falls within a certain range of dimensions. Typically, a quarter stick consists of a thick walled cardboard tube containing approximately 1 oz. (28.4 grams) of pyrotechnic flash powder, with a short length of Visco fuse protruding from the side or end of the device. No true standard for dimensions and construction exists, as these devices are products of bootleg manufacturers.
The term quarter stick is based on a quarter-stick of dynamite, which it somewhat resembles. However, quarter stick firecrackers do not contain nitroglycerin as dynamite does, and have far less explosive power.
In the United States, quarter sticks and similar large firecrackers are illegal to manufacture or possess without a BATFE High Explosives Manufacturing License.
They are sometimes colloquially known as M-1000s or 'block busters'.
See also[edit]
References[edit]
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In pyrotechnics a salute is a device primarily designed to make a loud report (bang), rather than have a visual effect, although most salutes will also have a very bright flash. They most commonly consist of a 70:30 mixture of potassium perchlorate and dark aluminium powder and may have titanium added for a cloud of sparks (titanium salute).[1] The salute may be fired on the ground (ground salute) or launched from a mortar as a shell (aerial salute). Due to the nature of the effect, large salutes are some of the more hazardous fireworks.
Most of the 'salutes' are made with flash powder. Flash powder has a very fast burn rate, unlike black powder.
All ground salutes over 50mg and air salutes over 130mg are restricted by the United States Consumer Product Safety Commission (CPSC) and the Child Protection Act of 1966.[2]
Examples of salutes[edit]
| Name | Dimensions | Amt. Flash Powder | Notes |
|---|---|---|---|
| Cherry bomb |
| 1 gram | Usually round and coloured red. The core contains flash powder, a layer of sawdust, and a coating of sodium silicate. |
| Silver Salutes |
| 1½ grams | Essentially the same as a M-80, except the tube is coloured silver and there is less flash powder. |
| M-80 |
| 2½–3 grams | Usually consists of a red tube and a green Visco fuse. Current firecrackers sold under the name 'M-80' are in fact much less powerful (50mg or less). |
| Super M-80 |
| 6 grams | |
| Super M-100 |
| 7 grams | Referred to as 'M-1000' on the US East Coast, 'Block Busters' on the West Coast |
| Quarter Sticks |
| 15 grams | These are not to be confused with quarter sticks of dynamite. |
| Barrel Bombs |
| ?? | They are sometimes 4½ in (11.4 cm) long, 13/16 in (3 cm) I.D. and 17/16 in (3.7 cm) O.D. They are generally black. |
| Half sticks |
| 25 grams | These are not to be confused with half sticks of dynamite. |
| M-1000s |
| 50-100 grams | These are not to be confused with M-100s above. |
† O.D. = Outer diameter
‡ I.D. = Inner diameter
References[edit]
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- ^Kosanke, Kenneth L.; Kosanke, Bonnie J. (1999). Selected Pyrotechnic Publications of K. L. and B. J. Kosanke, Part 4: 1995 Through 1997 (illustrated ed.). Journal of Pyrotechnics. p. 83. ISBN9781889526126.Extract of page 83
- ^T. Davis, The Chemistry of Powder and Explosives, Angriff Press, 1972. ISBN0-913022-00-4