Plastic bottle rocket
It is the model of the rocket to fly by water and reaction of the air to spout out by the plastic bottle rocket (English: water rocket) putting water and compressed air in contained plastic bottles such as the soda, and letting you throw a valve open at a stretch. I say a water rocket or the water rocket.
It is the greatest characteristic that this rocket model can perform the experiment of the model rocket easily in Japan where laws and regulations such as the gunpowder are severe. These only around 200 g of rocket which jet water by air pressure, and fly unlike other rocket propulsion engines is liked as security and the very interesting teaching materials in performing dynamic learning of action, the reaction.
In addition, in the case of the electric wire laying of the mountainous area, it is used for the overhead wire work from the ridge to the ridge by we doing not have to worry about the fire, we doing not have to worry about the environmental pollution without using the gunpowder. Chubu Electric Power calls the overhead wire work "a water rocket extension method of construction" and I am said to be [1] that I used first and connect two plastic bottles flying in nearly 400m, and the large-scale plastic bottle rocket which increased uses the capacity.
Although the production of the valve which can endure air pressure was slightly difficult, in late years a commercial withstand pressure dialect and launching device are released, and, in the early days, even the elementary school lower grades can launch production. Of course the launching as the competition is held in various parts of Japan because I may not fly straight concerning air resistance when I do not make it properly to fly at high speed and grasp the number of times to push the pump to put quantity and compressed air of the water to put again, a direction of the wind, and there is the skill-like aspect to transfer you along a fair wind, a head wind.
Table of contents
Safety measures
Although it is simple, as for the plastic bottle rocket, it is necessary to launch it in the open space without the person who is easy to perform neighboring ensuring safety because there are a lot of things flying more than 200m.
In addition, around an airport of Japan, display is prohibited by Aviation Act, and the presentation of the flight report book is necessary by all means when I launch it more than 250m (by the airway 150m) not the outskirts.
It is difficult to give air pressure as it explodes in the inflator for the bicycle, but there is this [the source required] introducing that I put foaming bath articles inside and may rarely explode from the wounds of the plastic bottle. Therefore the plastic bottle uses a thing of the soda because high pressure is applied. Because structure and strength are different with the thing of a green tea drink and the non-carbonic acid-based drink including the mineral water, I may be in danger.
Aviation Act
When it is prohibited based on Aviation Act depending on an air boundary launching a rocket that I launch it or when I launch it, in Japan, the report to the Minister of Land, Infrastructure and Transport may be necessary beforehand.
History
In the United States of America, a child, a student, the end of a junior school equivalent to the elementary school of Japan and the junior high school which similarly is equivalent to a junior high school receive a class to transfer a model rocket using the solid fuel which hardened gunpowder up to a university student and an adult for a long time, and there are many people to transfer by a hobby again.
However, that although the small thing is handling same as fireworks, as for the solid fuel which burns while gushing high-speed gas in Japan, as for the large-scale thing, a report is necessary for prefectural governors; various; is liable. In addition, a lot of forest and population crowd ground did not readily spread the model rockets. There were the circumstances that it was hard to test to be related to a small rocket in a school curriculum for a long time in Japan, but was gradually taken in in a school curriculum in this way when these plastic bottle rockets to collect compressed air in the plastic bottle which appeared as domestic waste articles in the 1990s, and to launch came to be known.
Manned flight
It is the plastic bottle locket which is a small and light rocket model, but the experiment to say to transfer a human being in this is originally performed.
I succeed in 2m30cm floating the pedestal (gross weight ignorance) with the chair which adult male and this sat down on by letting you jet 100 at the same time according to the place that you begin it from ten in subsidiary of Fuji TV program "spring ... splendid useless knowledge ... of the trivia" and tested. But it was designed to shove it in a rollover, approximately 2 degrees, the staff of the valve opening operation without thrust balance being produced by the experiment to transfer a weight of 60 kg using 30 performed beforehand in resultant of the jet from each plastic bottle by this experiment so that I established the guide rail by the experiment using 100, and a pedestal moved only to the vertical direction. It is the world's first manned flight with the plastic bottle rocket and, in the Class same order, names this experiment "a first Japanese manned rocket" [2].
In addition, "even subsidiary of Nippon Television program Sekai No Hate Made ItteQ!" carries out a similar experiment by the plan in the program. By this experiment conducted in Thailand, a plastic bottle for the soda of 3L that circulated locally was used. In the program, I bundled up similar plastic bottle six of them, 12 of them and I carried it on my back like a school satchel and tried a flight, but I jumped without enough thrusts in six of them a little and just fell from a head without balance being produced although approximately 1m was directly overhead, and every Tetsuro Degawa who attached a rocket at the moment when it jetted it with 12 flew up. I put 14 together in a doughnut type after this and used the rocket which a human being got on for the center, but approximately 5m flew laterally when it was broken before firing it and produced the large-scale rocket which finally put 52 plastic bottles together in a doughnut type, and it was fired towards the sea by a launching pad put up diagonally.
In addition, is the same; of the subsidiary of Nippon Television program the picture which Ito extreme longevity man carries a plastic bottle rocket on his back in "特 ホウ kingdom, and seemed to fly number 10m was broadcasted, but though turn so that this nearly falls forward after discharge, a posture is rebuilt unnaturally in the air, and a contribution" is very likely to be the forgery picture which used wires.
Footnote
- ^ supply of electric power department "all the thirteenth company supply of electric power technology Olympics "new technology introduction" (PDF)," it is page 28 in "technology development news]" 88th, Chubu Electric Power, January, 2001. - The introduction article of the same technique method is placed.
- A rocket plane "cherry blossom" and "the cold steel" which the Japanese forces developed which are ^ perform a manned power flight during World War II.
References
- 造事務所編 "a complete illustration plastic bottle rocket lecture is how to make, tobashi" Futaba Corporation, 1996. ISBN 4-575-28568-4。
- It is (original work 1999), revised edition, 161-172 pages "12 林熙崇, Yoji Iida in or I go to where water rocket" "lively physical experiment 2 Aichi, Gifu, three folds of physics circle compilation, Japan criticism Corporation, 2002 to be heated to be heated". ISBN 4-535-78338-1。
Allied item
- Rocket
- A model rocket using model rocket - gunpowder.
- The third law of the exercise
- Plastic bottle
- Potato bazooka
- An animation applying to men toss # メントスガイザー - plastic bottle rocket is shown on a net.
Outside link
- "YAC Japan space Boy Scouts / Young Astronauts Club - Japan". December 8, 2011 reading. - I perform the enforcement of the water rocket contest in Japan and the sale of water rocket connection goods.
- "Association of plastic bottle craft Internet branch office -PCAJapan Internet Branch- in Japan". December 8, 2011 reading. - I perform a rental and the sale of the appliance necessary for production, launching.
- "Association of Japanese model rocket top page". December 8, 2011 reading. - The voluntary NPO corporation which I lecture on of the model rocket.
- Yoji Iida. "Water rocket". Lively physical experiment and Yoji Iida who are boiled who are boiled. December 8, 2011 reading.
This article is taken from the Japanese Wikipedia Plastic bottle rocket
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