Sentetsu Tehosa-class locomotive
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| Chosen Government Railway Tehosa class (テホサ) Korean National Railroad Teou3 class (터우3) Korean State Railway Tŏusŏ class (더우서) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
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 Builder's photo of a Tehosa-class locomotive. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Data for locomotives as rebuilt in the 1930s. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
The Tehosa-class (テホサ) locomotives were a class of steam tender locomotives of the Chosen Government Railway (Sentetsu) with a 4-6-0 wheel arrangement.[1] The "Teho" name came from the American naming system for steam locomotives, under which locomotives with 4-6-0 wheel arrangement were called "Ten Wheeler".[2]
After the Liberation of Korea, of the 178 surviving locomotives of all Teho classes - including six previously owned by private railway companies - 106 went to the Korean National Railroad in the South, and 72 to the Korean State Railway in the North.[3]
Whilst the first two classes of 4-6-0 locomotives in Korea, the Tehoi and Tehoni classes, were built by Baldwin, Sentetsu turned to a different American manufacturer for the third class - ALCo's Brooks Works[4] built nine such locomotives for Sentetsu in 1911.[1] Intended for long-range mixed trains, they were initially numbered 222–230, and subsequently were renumbered 651–659 in 1918. After being rebuilt with superheaters in the 1930s, they were redesignated テホサ (Tehosa) class and numbered テホサ1 through テホサ9 in the 1938 general renumbering.[4] Like all Teho-type locomotives operated by Sentetsu, they had driving wheels of 1,680 mm (66 in) and a top speed of 95 km/h (59 mph),[1] and many were assigned to the Manpo Line in the northern part of the country.[1] One final unit, テホサ10, was built by Gyeongseong Works in 1938.[4]
