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127:-type fuel, possibly with additives that produce a decorative spark trail as the rocket ascends, but other chemical reactions have also been used for thrust. The fuel is pressed to form a solid grain inside a cardboard tube, which is sealed at the top but open at the bottom with an air gap. When the fuel is ignited from the bottom, hot gases expand in the air gap and are expelled downward to propel the rocket upward. Other fuels are possible; a common alternative is
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firework rockets are sold by weight, e.g.: 4 oz (110 g), 8 oz (230 g), 1 lb. This is not the weight of the rocket itself, but rather of a lead sphere whose diameter matches that of the rocket motor. Rocket weight in the UK is officially defined as "the weight of a lead sphere
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These rockets have been made at least since the early decades of the 20th century, and in many countries, including Japan and China. The older type of bottle rocket was typically a black powder skyrocket with an engine about 2 inches (5 cm) long and up to 0.375-inch (9-mm) diameter, mounted
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Bottle rockets are specifically illegal in many jurisdictions, even those where most other consumer fireworks are legal. They are sometimes considered to present a unique hazard, due to their ability to fly in many directions other than vertically.
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A common misconception about professional fireworks displays is that skyrockets are used to propel the pyrotechnic effects into the air. In reality, skyrockets are more widely used as a consumer item. Professional fireworks displays utilize
97:, bangs, crackles, etc.) to be emitted. Skyrockets use various stabilisation techniques to ensure the flight follows a predictable course, often a long stick attached to the side of the motor, but also including spin-stabilisation or fins.
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charge. Modern bottle rockets are small and very cheap. They are often sold by the box (but more commonly by the pack, or by the gross, a packet of 144 rockets) for less than US$ 0.20 each.
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Skyrockets were officially banned in Norway starting from the new years eve of 2008/09. Skyrockets are strictly forbidden, and carry heavy fines for anyone who are caught launching them.
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7183 was enacted to regulate and to control the sale, distribution, manufacture and use of fireworks and firecrackers for
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Image sequence of a launch of a skyrocket. The time interval between the images is about 0.1 seconds
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is a small skyrocket. At the apex of its ascent, it is usual for a variety of effects (
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452:"Piccolo, kwitis, Goodbye Bading, others lead 'cracker-related injuries"
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In India, bottle rockets are set off during the Hindu festival of
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Authorization
Guidelines for Consumer and Display Fireworks
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region, many are made by hand and sold in conjunction with
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A bottle rocket consists of three major parts including:
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This article is about the firework. For other uses, see
260:. The largest bottle rockets used at the festivals are
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478:Wilhelm Klein; John Gottberg; Hans Hoefer (1987).
101:on a thin bamboo splint and often having a small
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287:supported by a tube that the rocket motor will
524:- examples of skyrockets, with data such as
422:Roxas, Joseph Tristan (November 29, 2016).
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450:Elona, Jamie Marie (December 31, 2012).
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379:Archived
350:See also
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163:to fire
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202:Diwali
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