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pyrotechnics |
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pyrotechnics (pī'rōtĕk`nĭks, pī'rə–), technology of making and using fireworks. Gunpowder was used in fireworks by the Chinese as early as the 9th cent., and it was they who brought fireworks to a high stage of development. The use of fireworks for display has spread throughout the world. In many countries fireworks are used to celebrate national holidays, e.g., Independence Day in the United States and Bastille Day in France. Many combustibles and explosives and ingenious combinations of the two have been devised to produce impressive sounds and lights of many colors and to drive wheels and rockets. Fireworks are also widely used as signal devices, e.g., various colored flares and smoke grenades to denote distress or to locate targets in military operations. Powerful flares are also used in combat to illuminate enemy positions. pyrotechnics 1. the art or craft of making fireworks 2. a firework display pyrotechnics [¦pī·rə¦tek·niks] (engineering) Art and science of preparing and using fireworks. (materials) Items which are used for both military and nonmilitary purposes to produce a bright light for illumination, or colored lights or smoke for signaling, and which are consumed in the process. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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In addition to security issues, safety issues became a concern because the jets' ejector seats and canopies are operated by pyrotechnic devices. Activation by a pyrotechnic device, in the event of an impact, occurs in milliseconds and its effect is to help cushion the pedestrian's body. The military for years has used pyrotechnic devices in training exercises. |
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