Skyrocket

Source: Wikipedia, the free encyclopedia.
(Redirected from
Bottle rocket
)
This article is about the firework. For other uses, see Skyrocket (disambiguation), Bottle rocket (disambiguation), and Qassam rocket.
Assorted sky rockets
Launch of a bottle rocket
Double-staged bottle rocket
Image sequence of a launch of a skyrocket. The time interval between the images is about 0.1 seconds

A skyrocket is a type of

solid-fuel rocket to rise quickly into the sky; a bottle rocket is a small skyrocket. At the apex of its ascent, it is usual for a variety of effects (stars
, 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.

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 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 (but more commonly by the pack, or by the gross, a packet of 144 rockets) for less than US$0.20 each.

Construction

A bottle rocket consists of three major parts including:

  • The
    whistle mix
    , to produce a whistling rocket.
  • The nose cone, in addition to serving an aerodynamic role, typically contains the rocket's payload. This may include exploding fireworks, colored stars, a parachute, confetti, or other decorative items.
  • The guide stick, in a bottle rocket lacking fins or other stabilizers, provides stability in flight. The stick's length and weight are sized to achieve this.

Professional displays

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

aerial shells
into the air, not rockets.

Sale and regulation

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.

Canada

Bottle rockets are banned under the Explosives Act, thus making importation, possession, transportation, storage or manufacturing illegal in Canada.[1]

India

In India, bottle rockets are set off during the Hindu festival of Diwali, and are sold in the millions.

Norway

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.

Philippines

In the

public safety.[2] According to the said law, skyrockets (known in the Philippines as kwitis) are legal and are designed to propel from 40–50 feet (12–15 m) before exploding.[2][3] Despite being legal, it poses danger to those using it. In 2012, it was recorded that skyrockets were the second most harmful firecracker after piccolo.[4]

Thailand

In

black powder.[5][6]

United Kingdom

In the United Kingdom 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 that is just supported by a tube that the rocket motor will just fit into." [citation needed]

Image gallery

  • Skyrocket just after liftoff
    Skyrocket just after liftoff
  • Launching skyrocket
    Launching skyrocket
  • Skyrocket in flight
    Skyrocket in flight
  • Skyrocket at explosion
    Skyrocket at explosion

See also

  • Water rocket, a model rocket propelled by water and compressed air, sometimes referred to as a "bottle rocket" as they are often constructed from soda bottles.

References

  1. ^ Authorization Guidelines for Consumer and Display Fireworks Archived 2011-04-01 at the Wayback Machine
  2. ^ a b "REPUBLIC ACT NO. 7183". chanrobles.com. Retrieved December 29, 2016.
  3. GMA News
    . Retrieved December 28, 2016.
  4. ^ Elona, Jamie Marie (December 31, 2012). "Piccolo, kwitis, Goodbye Bading, others lead 'cracker-related injuries". Philippine Daily Inquirer. Retrieved December 29, 2016.
  5. ^ Wilhelm Klein; John Gottberg; Hans Hoefer (1987). Burma. APA Productions.
  6. ISBN 1903471540
    .

External links
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