By Mary Firestone
This sequence investigates strange careers in science-related fields and reveals out approximately normally thought of ways that technology should be positioned to take advantage of. With complete color phtographs and illustrations. a while 12-16 years.
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Extra info for Pyrotechnician (Weird Careers in Science)
Example text
Slow match: Twisted hemp rope soaked in limewater and saltpeter. It burns at the rate of 4 to 5 inches (10–13 cm) per hour, and is used for firing cannons and fireworks. Sparklers: A handheld consumer firework that burns slowly while emitting colored flames and sparks. Squib: Small explosive device that, when detonated, will simulate the effect of a bullet/puncture wound or small explosion. Star: A gumdrop-sized mixture that lights up with sparks when it burns, resembling a falling star. Strobes: Clusters of flashing silvery light that float slowly to the ground.
Time codes sent from the laptop computer to a satellite orbiting Earth are processed and sent back to a module at the display area, which electronically sets off the fuses. All three displays go off at the same time, as the pyrotechnicians sit back and enjoy the show. This fireworks display was planned according to a script, which describes on paper exactly which shells will be bursting when. The show’s pacing and artistic elements, which may include music, are described in the script, and all of this information is entered into the laptop computer.
Wires are attached to e-matches, which are connected to a fuse and then to the computer. Before the show, at dusk, pyrotechnicians take their places at the firing station (also called the command center, where the lead pyrotechnician directs the show). 2). When the lead pyrotechnician gives the signal, the show goes on. Pyrotechnicians push buttons on the laptop keyboard, flip switches, and ignite the fuses. PLANNING A SHOW Pyrotechnicians in the field communicate client orders to the factory. 2 Pyrotechnicians use computers to plan shows and set off fireworks.