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bottle rocket : ウィキペディア英語版
bottle rocket

A bottle rocket is a very small skyrocket. A typical bottle rocket consists of a rocket engine attached to a stabilizing stick. The user can place the stick in an empty bottle (hence the name), and ignite the rocket engine; the mouth of the bottle guides the stick, stabilizing the rocket in its first moments of flight. In India, bottle rockets are set off during the Hindu festival of Diwali, and are sold in the millions.
These rockets have been made at least since the early decades of the 20th century, and in many countries, including Japan, China, and Macao. The older type of bottle rocket was typically a black powder skyrocket with a motor about 2 inches (5 cm) long and up to 0.375 inch (9 mm) diameter, mounted on a thin bamboo splint and often having a small report charge.
Modern bottle rockets are small and very cheap. They are often sold by the box (Although more commonly by the gross, a packet of 144 rockets) for less than $US 0.20 each. In Thailand's Isan region, many are made by hand and sold in conjunction with Rocket Festivals. The largest bottle rockets used at the festivals are ''Bang Fai'' rockets which can be up to 20 metres long and charged with up to 500 kg of black powder.
==Countries==
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.
Bottle rockets are authorized under the ''Explosives Act'', thus making importation, possession, transportation, storage or manufacturing illegal in Canada.〔(Authorization Guidelines for Consumer and Display Fireworks )〕
Bottle rockets are illegal in several states in the USA, but they are cheap and very easy to obtain.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「bottle rocket」の詳細全文を読む



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