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  • Were at one of the UK’s leading firework manufacturers

    目前我們位於英國頂尖的煙火工廠

  • and this is their 125 mm air starburst shell.

    這是他們製造的125釐米高空煙火彈

  • A 20-minute display will not drop 10,000 fireworks.

    一場20分鐘的煙火秀會施放超過1萬發煙火

  • And 60% of them will release bad boys.

    有60%是用這顆超屌的煙火彈

  • Each one costs around £ 30 and contains half a kilo of explosive.

    每顆要價30歐元 裡面裝填了半公斤的火藥

  • And we have to launch it to a height to over 100 meters.

    我們要把它發射到百尺以上的高空

  • As you can see, it’s much more than a bowl of loose powder.

    如你所見 這可不只是一碗鬆散粉末

  • And this is how they test the component parts.

    而這 就是他們測試重要零件的方法

  • The basic firework recipe is flash powder,

    煙火的基本材料是閃光粉

  • a potent form of gunpowder.

    也就是火藥的主要成分之一

  • It’s a mixture of Potassium Perchlorate and Aluminium.

    混合了高氯酸鉀和鋁

  • These ingredients are mixed together in 7 kilo batches

    這些原料混合成7公斤的材料

  • and a small sample is ignited to make sure it has a requisite brightness.

    會點燃一些樣品 確保符合標準亮度

  • This sample has been mixed with Strontium to make it glow red and it’s clearly a pass.

    原料摻入鍶後 會發出紅光 顯然這樣品合格

  • Well, this sample has Barium added to glow green.

    發出綠光的 則是摻入了鋇

  • Again, it does the trick nicely.

    這樣品顯然也合格了

  • If a firework is packed with this loose powder,

    如果煙火裡裝的是鬆散粉末

  • it would explode in one instant flash.

    爆炸時只會發出短暫光芒

  • So the gun powder mixture is turned into pellet to prolong the burn time.

    因此要將混合好的火藥做成球 延長燃燒時間

  • As the burning pellets go to the sky,

    當燃燒中的火藥球飛上天

  • they create the spreading patterns we are all familiar with.

    會形成我們都很熟悉的煙火花樣

  • This test checks whether this particular pellets size will burn of its efficient time

    現在在測試這些火藥球的燃燒時間

  • to create a burst diameter of 18 meters.

    它們要達到18公尺的爆炸直徑

  • There are two roughly formed rings of starscentral ring and an outer ring.

    這是火藥球的排列雛形 有內圈及外圈

  • The outer ring is made of stars of a slightly larger size.

    外圈的火藥球比較大顆

  • Therefore their behaviour and when they burst in the middle

    因此當煙火爆炸時

  • ignites these stars and blows them in the circle formation.

    會點燃這些火藥球 形成圓形圖樣

  • The initial will be the heavy larger stars will travel further.

    這些大火藥球會飛得比較遠

  • That’s in the sky youll see one small ring and then a larger ring around it.

    這也就是你在空中會看到的雙圈煙火

  • The next test checks the fireworks 2 fuses.

    接下來要測試煙火的兩條引線

  • Firstly, a length of fuse is measured down to which itll slowly burn inside the firework

    首先 引線要能在煙火內緩慢燃燒

  • to ensure it ignites at the correct altitude.

    確保會在正確高度點燃火藥

  • A fuse this length should burn any about 12 seconds.

    這種長度的引線要能燃燒12秒

  • It has, so it’s a pass.

    達到12秒了 通過測試

  • As second external fuse is needed to lose the firework.

    第二條外部引線需要脫離煙火

  • Racking the fuse in paper should contain the hot gases

    引線外頭裹著紙 含有易燃氣體

  • and make the fuse burn much quicker.

    讓它能燃燒得更快

  • We expect this link to fuse to burn within a hundred fifty second.

    這條引線要在0.001秒內燃燒完畢

  • Looks like a pass to me.

    好像火箭飛過我面前

  • The final test is to ensure the firework is no louder than European regulation of 120 decibels.

    最後要確保煙火音量低於歐規120分貝

  • The same noise level as enigmatic drill at close range.

    大概跟電鑽的音量差不多

Were at one of the UK’s leading firework manufacturers

目前我們位於英國頂尖的煙火工廠

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B2 中高級 中文 英國腔 煙火 燃燒 火藥 點燃 測試 爆炸

超神奇!煙火怎麼來的呢? I Didn't Know That - Fireworks

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    Go Tutor 發佈於 2014 年 12 月 29 日
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