Sentetsu Goroi-class locomotive

Chosen Government Railway Goroi class (ゴロイ) Korean State Railway Koroha class (고로하)
Type and origin Power type Steam Builder Kisha Seizō Build date 1924 Total produced 3
Specifications Configuration: ​  • Whyte 2-4-2T Gauge 1,435 mm (4 ft 8+1⁄2 in) Driver dia. 1,370 mm (54 in) Length 9,292 mm (365.8 in) Height 4,250 mm (167 in) Adhesive weight 28.00 t (27.56 long tons) Loco weight 43.85 t (43.16 long tons) Fuel type Coal Fuel capacity 1.27 t (1.25 long tons) Water cap. 4.50 m3 (159 cu ft) Firebox: ​  • Grate area 1.12 m2 (12.1 sq ft) Boiler: ​  • Small tubes 68 x 51 mm (2.0 in)  • Large tubes 15 x 137 mm (5.4 in) Boiler pressure 13.0 kgf/cm2 (185 psi) Heating surface: ​  • Firebox 5.6 m2 (60 sq ft)  • Tubes 47.4 m2 (510 sq ft)  • Total surface 69.2 m2 (745 sq ft) Superheater: ​  • Heating area 16.2 m2 (174 sq ft) Cylinder size 300 mm × 457 mm (11.8 in × 18.0 in) Valve gear Walschaerts
Performance figures Maximum speed 75 km/h (47 mph) Tractive effort 32.0 kN (7,200 lbf)
Career Operators Chosen Government Railway Korean State Railway Class Sentetsu: ゴロイ KSR: 고로하 Number in class 3 Numbers Sentetsu: ゴロイ1 – ゴロイ3 (1938-1945) KSR: 고로하1 – 고로하3

The Goroi class (ゴロイ) was a class of steam tank locomotives of the Chosen Government Railway (Sentetsu) with 2-4-2 wheel arrangement. The "Goro" name came from the American naming system for steam locomotives, under which locomotives with 2-4-2 wheel arrangement were called "Columbia".

Three were built by Kisha Seizō of Japan for Sentetsu in 1924. They received the ゴロイ1 through ゴロイ3 numbers in Sentetsu's general renumbering of 1938.

After the partition of Korea, all three Goroi-class locomotives went to the Korean State Railway in North Korea, where they were designated 고로하 (Koroha) class and numbered 고로하1 through 고로하3.