The tubes, or "mortars," are three times as long as the firework shells but have the same diameter. If a firework doesn't fit snugly into its launch tube, the pressure created by the lift charge ...

Please verify your email address. A special device created by the artisan Pengyi. It comes with functions that allow for the creation and automated launch of fireworks. In the hands of someone ...

Because of the effect caused, pyrotechnicians call a firework that misfires and explodes within the launch tube a "flowerpot." Of the 656,548 fires in the United States reported by the United ...