Events and games
Aerial shell (No. 10) in section
Aerial shell in section: the stars keep their relative positions as they fly, so how they are packed is the shape you see
This drawing comes from one YAML file. No shape was moved by hand.
Notes in the source (in Japanese)
星は、玉の中の位置関係を保ったまま広がる。 だから球に開く。
星を球の面に沿って隙間なく並べ、中心の割薬で一度に押し出す。並べ方が、そのまま開いた形になる。
星は芯に薬を掛け重ねた層で、燃えるのは掛けた順の逆(菊 → 紅 → 銀)。作った順と、見える順が逆になる図。
号数は打揚筒の内径を寸で表したもの(10 号 = 1 尺 = 30.3cm)。玉はそれより少し小さい。打揚高・開花直径は目安(10 号で約 330m・280〜300m)。照合(2026-10-02):ハナビディア「花火の号数とは?」(号数は筒の内径が基準、10 号は内径 30.3cm)https://www.hanabidia.com/size-of-fireworks/同ページの表は 10 号の玉の直径 29.5cm・開花直径 320m。開花直径は資料で幅があるので表は目安。
Source (YAML)
examples/gallery/212-割物花火の断面.zumen.yaml
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