Big Boy (English spelling)

Japanese: Big Boy(英語表記)BigBoy
Big Boy (English spelling)

...The former had a 1-D-D-D-1 axle arrangement (three sets of four driving wheels with leading and trailing wheels in front and behind), a total length of 31.4 m, a total weight of 387 t, and a cylinder tractive force of 72.6 t (about four times that of Japan's D51). The latter was nicknamed Big Boy, and had a 2-D-D-2 axle arrangement, a total length of 25.9 m, a total weight of 508 t, and a cylinder tractive force of 61.5 t, but with a driving wheel diameter of 1727 mm and a maximum speed of 130 km/h, it can be said to be the world's strongest steam locomotive in terms of locomotive output (tractive force x speed). The speed record was 202.8 km/h by the Mallard in England in 1938, and in Japan, the C62 type recorded a speed of 129 km/h in 1954. ...

*Some of the terminology that mentions "Big Boy" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…前者は,軸配置1‐D‐D‐D‐1(動輪4個が1組のもの3組とその前後に先輪,従輪を配したもの)で,全長31.4m,総重量387t,シリンダー牽引力72.6t(日本のD51の約4倍)であった。後者はビッグボーイBig Boyの愛称をもち,軸配置2‐D‐D‐2,全長25.9m,総重量508t,シリンダー牽引力61.5tであるが,動輪径が1727mmもあり最高時速は130kmも出せるので,機関車出力(牽引力×速度)では世界最強の蒸気機関車といえる。速度記録としては,1938年イギリスのマラードMallard号による時速202.8kmがあり,日本では,54年C62形式が時速129kmを記録している。…

※「Big Boy」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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