Chosen Government Railway Tehoshi class (テホシ) Korean State Railway Tŏunŏ class (더우너)
Tehoshi-class locomotive number 238 as built in 1913.
Type and origin Power type Steam Builder ALCo Build date 1913 Total produced 4
Specifications Configuration: ​  • Whyte 4-6-0 Gauge 1,435 mm (4 ft 8+1⁄2 in) Driver dia. 1,680 mm (66 in) Length 18,625 mm (61 ft 1.3 in) Width 2,972 mm (9 ft 9.0 in) Height 4,232 mm (13 ft 10.6 in) Loco weight 68.40 t (67.32 long tons) Tender weight 43.03 t (42.35 long tons) Fuel capacity 6.00 t (5.91 long tons) Water cap. 15,100 L (4,000 US gal) Firebox: ​  • Grate area 3.72 m2 (40.0 sq ft) Boiler: ​  • Small tubes 264 x 57 mm (2.2 in) Boiler pressure 12.6 kgf/cm2 (179 psi) Heating surface: ​  • Firebox 12.00 m2 (129.2 sq ft)  • Tubes 156.50 m2 (1,684.6 sq ft)  • Total surface 174.80 m2 (1,881.5 sq ft) Cylinders 1 Cylinder size 510 mm × 660 mm (20 in × 26 in) Valve gear Walschaerts
Performance figures Maximum speed 95 km/h (59 mph) Tractive effort 111.0 kN (25,000 lbf)
Career Operators Chosen Government Railway Korean State Railway Class Sentetsu: テホシ KSR: 더우너 Number in class 4 Numbers Sentetsu: テホシ1–テホシ4 KSR: 더우너1–더우너4 Delivered 1913

TheTehoshi-class (テホシ) locomotives were a class ofsteamtender locomotives of theChosen Government Railway (Sentetsu) with4-6-0wheel arrangement.^[1] The "Teho" name came from theAmerican naming system for steam locomotives, under which locomotives with 4-6-0 wheel arrangement were called "Ten Wheeler".^[2]

After theLiberation of Korea, of the 178 surviving locomotives ofall Teho classes - including six previously owned by private railway companies - 106 went to theKorean National Railroad in theSouth, and 72 to theKorean State Railway in theNorth.^[3]

Following the brief excursion toALCo for theTehosa class, Sentetsu once again returned toBaldwin for the next order of 4-6-0s. This was a small lot of four locomotives built in 1913, initially numbered 235–238 and intended for local freight trains, and had a lower profile than the previous Baldwin designs.^[1] They were renumbered 661–664 in 1918, finally being designatedテホシ (Tehoshi) class in the 1938 general renumbering, numbered テホシ1 through テホシ4.^[1]

All four locomotives of the class went to theNorth after the partition, where they were designated더우너 (Tŏunŏ) class by theKorean State Railway and numbered 더우너1 through 더우너4, but little is known of their service lives and subsequent fates.

• Locomotives of Korea under Japanese rule
• Locomotives of North Korea
• Steam locomotives of South Korea
• Scrapped locomotives
• Railway locomotives introduced in 1913
• 4-6-0 locomotives
• 2′C locomotives
• Baldwin locomotives

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